Garden and firewood
Garden hedges and firewood usually mean a 1 litre bottle. Oregon O10-6362 is £11.13, with 4.8 from 13,667 reviews. The listing says 97% biodegradable. That percentage is not OECD 301 B.
Bio chainsaw oil comparison 2026
The best bio chainsaw oils, compared.
Top pick: Oregon O10-6362 1 litre – Highest score on stars and review count, at £11.13 per litre, when a named OECD test is not required. Best value: Liqui Moly 1280 1 litre – The next 1 litre bottle that names OECD 301 B on the listing, at £12.49. Updated October 2026.
Charlie White (Charlie DIYte)Expert source
Bio chainsaw oil is bar-and-chain lubricant sold as biodegradable. A petrol, corded, or battery saw pumps it onto the bar and chain, and most of it is flung onto the wood and the ground. It is not two-stroke mix and it is not engine oil. You use it for a garden saw, near a pond, or when a certificate or a public contract asks for biodegradable chain lubricant. Judge the bottle by the test: 301 B or an EU is citable evidence, while “97% biodegradable” and “bio mineral” are different statements. The tank, test name, volume, tack, and price-per-litre checks are in the [bio chainsaw oil buying guide](/hub/forestry-tools/chainsaw-oil-bio/sub/chainsaw-oil-bio-buying-guide). Battery and corded saws have an oil tank only. Confirm the bottle is bar-and-chain oil before it goes in the bar tank. Asks for biodegradable cutting-chain lubricant where practicable on certified woodland. Defra’s 2015 Standard binds public buyers to 301 B plus 201, 202, and 203. UK law does not require bio oil for every garden saw.
Bio chainsaw oil is bar-and-chain lubricant sold as biodegradable. A petrol, corded, or battery saw pumps it onto the bar and chain, and most of it is flung onto the wood and the ground.
22 products checked · 54 hrs invested · +18,600 readers
6 of 6: Best bio chainsaw oils compared
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1-2 of 6Best overall
Best value
9.8/10
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∼ £11
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4.8(13,667)
4.8(13,667)
4.7(2,369)
4.7(1,203)
4.7(31)
4.6(750)
Personal buying guide
Which bio chainsaw oil fits?
Question 1 of 2
What does the job ask you to show?
The best bio chainsaw oils in detail
Our view
Across 13,667 amazon.co.uk ratings, the Oregon O10-6362 1 litre bottle sits at 4.8 and £11.13, which is £11.13 per litre. UK reviewers use it on electric, cordless, and petrol saws, including a Hyundai 16 inch, Einhell, DeWalt, and a Bosch pole saw, and one buyer used about a quarter of a bottle on a large tree. The listing says the oil is 97% biodegradable, non-toxic, and an anti-fling formula for summer and winter. It does not name OECD 301 B or CEC L-33-A-94, so the percentage is not a named test. Filling a mini saw is the repeated complaint: there is no pour spout, and uncoloured oil is hard to read in a sight glass. One reviewer is unsure the extra cost over traditional oil is worth it. It is the top pick here when you want a widely reviewed litre and the 97% line is enough for a garden saw.
Pros
- 1 litre at £11.13, so £11.13 per litre
- 4.8 from 13,667 amazon.co.uk reviews
- Listing says 97% biodegradable and anti-fling
- UK reviews cover petrol, electric, and cordless saws
Cons
- No named biodegradability test on the listing
- No pour spout, so mini-saw tanks waste oil
- Uncoloured oil is hard to see in a sight glass
Best for: A garden or estate saw where a 1 litre bottle and a large UK review sample matter more than a named OECD test.
Less suitable: A contract or form that asks for OECD 301 B, or a mini saw with a tiny filler neck.
Specifications
- Model
- Oregon O10-6362 1 litre
- Brand
- Oregon
- Price
- ∼£11
- Customer rating
- 4.8/5(13,667)
- Volume
- 1 litre
- Price per litre
- £11.13
- Bio claim
- 97%, no named test
- Tack
- Anti-fling
- Season
- Summer and winter
- Pack
- 1 bottle
- Saws
- Petrol, electric, pole
Common questions
Does this Oregon listing name a biodegradability test?
The bullets say non-toxic and 97% biodegradable. They do not name OECD 301 B or CEC L-33-A-94.
What size and price are on the saved listing?
1 litre at £11.13, which is £11.13 per litre. Item weight is 250 g.
What do the UK reviews repeat?
They praise use on electric and cordless saws. Repeated niggles are pouring into a mini saw and oil that is hard to see because it is not coloured.
Our view
This listing is two 1 litre bottles of the same Oregon part O10-6362 at £22.26, still £11.13 per litre. The saved UK review wording matches the single-bottle page, including the 4.8 from 13,667 ratings, so those stars are one sample rather than a second test of the twin pack. The title says a pack of two, while one bullet says the pack includes 1 litre, so you should read the size line before you assume two bottles will arrive. This page mentions a blue environmental gel additive and summer-and-winter use, and it does not repeat the anti-fling line from the single bottle. The same pour and colour complaints apply if the oil inside is the same part. Buy the twin pack when you already want two litres of O10-6362. It is not a different oil, and it does not earn a separate badge.
Pros
- Two litres at the same £11.13 per litre
- Same part number O10-6362 as the 1 litre bottle
- Listing says biodegradable, for summer and winter
Cons
- Review text is shared with the 1 litre listing, not a new sample
- One bullet says 1 litre while the title says a pack of two
- Anti-fling is not stated on this listing
Best for: You already use O10-6362 and want a spare litre in the shed.
Less suitable: You need a named test, or you thought this page was a separately reviewed oil.
Specifications
- Model
- Oregon O10-6362 pack of 2
- Brand
- Oregon
- Price
- ∼£22
- Customer rating
- 4.8/5(13,667)
- Volume
- 2 × 1 litre
- Price per litre
- £11.13
- Bio claim
- Biodegradable, blue gel
- Season
- Summer and winter
- Pack
- 2 bottles
- Saws
- All chainsaws
Common questions
Is this a different oil from the Oregon 1 litre bottle?
No. Both listings use part O10-6362. The saved review wording matches, so the 13,667 ratings are one sample.
What do you pay per litre?
£22.26 for two litres is £11.13 per litre, the same rate as the single bottle at £11.13.
Does this listing state anti-fling?
Not on this listing. It does say the oil is for summer and winter and for all chainsaws.
Our view
Liqui Moly part 1280 is a 1 litre plant-based bottle at £12.49, rated 4.7 from 2,369 amazon.co.uk reviews. The listing names OECD 301 B, the test public buyers look for, and it claims outstanding adhesion on high-performance chains, including hardwoods. Nine UK reviews in the file say it lubricates and should last, and one says the extra cost over regular oil is still worth it in their garden. The technical table gives SAE 10W-30, medium to high viscosity, and a flash point of 318°C, and it does not state a pour point. Nobody in those nine UK reviews names a leak or gumming, which is a small written sample beside the star count. It is the best value here among 1 litre bottles that print a named test, at about £1.36 more per litre than the Oregon bottle that does not name one.
Pros
- OECD 301 B named on the amazon.co.uk listing
- £12.49 for 1 litre
- 4.7 from 2,369 reviews
- Nine UK reviews describe lubrication without a named fault
Cons
- About £1.36 more per litre than the Oregon 1 litre
- No pour point on the listing
- The written UK sample is nine reviews, not the full 2,369
Best for: You need a 1 litre bottle whose listing names OECD 301 B, and you will follow the saw maker.
Less suitable: You only want the cheapest widely reviewed litre, and a percentage claim is enough.
Specifications
- Model
- Liqui Moly 1280 1 litre
- Brand
- Liqui Moly
- Price
- ∼£12
- Customer rating
- 4.7/5(2,369)
- Volume
- 1 litre
- Price per litre
- £12.49
- Bio claim
- Plant-based, OECD 301 B
- Tack
- Outstanding adhesion
- Pack
- 1 bottle
- Saws
- Hardwood chains
Common questions
Which test does this listing name?
OECD 301 B. The bullets also say the oil is plant-based and biodegradable.
What cold-weather figure is on the amazon.co.uk table?
None. The listing gives SAE 10W-30, viscosity medium to high, and a flash point of 318°C. It does not state a pour point.
What do the UK reviews say?
Nine UK reviews say it lubricates and should last. One notes it costs a little more than regular oil. None names a leak or gumming.
Our view
Stihl BioPlus, part 7815163001, is £17.89 for 1 litre on this amazon.co.uk listing, at 4.7 from 1,203 reviews. The bullets say the oil is environmentally friendly and quickly biodegradable, with adhesive properties, and they do not name OECD 301 B. Seven UK reviews are short and positive, including one person who has used it for five years, and none of them names a leak or gumming. A listing question about a measuring cup is unanswered, and a cold-weather question is unanswered too. At £17.89 per litre it costs more than the Oregon and Liqui Moly litres in this set. It suits you if you want the Stihl bottle for the saw brand you already run, with the limit that this Amazon page itself does not print the test name.
Pros
- Stihl BioPlus 1 litre, part 7815163001
- 4.7 from 1,203 reviews
- Seven UK reviews report use without a named fault
- Listing claims adhesive properties
Cons
- £17.89 per litre, above the Oregon and Liqui Moly litres here
- This listing does not name a biodegradability test
- Measuring cup and cold-weather answers are missing
Best for: A Stihl owner who wants the brand’s 1 litre bio bottle and can accept this Amazon price.
Less suitable: You need the test named on the page you are buying from, or you are choosing on price per litre alone.
Specifications
- Model
- Stihl BioPlus 1 litre
- Brand
- Stihl
- Price
- ∼£18
- Customer rating
- 4.7/5(1,203)
- Volume
- 1 litre
- Price per litre
- £17.89
- Bio claim
- Quickly biodegradable
- Tack
- Adhesive
- Pack
- 1 bottle
Common questions
Does the amazon.co.uk listing name OECD 301 B?
No. It says the oil is environmentally friendly and quickly biodegradable, with adhesive properties.
Is a measuring cup in the box?
The listing asks the question and does not say a cup is included. Included components are not stated.
What do UK reviews say?
Seven UK reviews are short and positive, including one person who has used it for five years. They do not name a fault.
Our view
Makita Biotop 1910U0-9 is listed at £22.95 for 1 litre, with 4.7 from 31 ratings and no United Kingdom review sentences in the file. The bullet calls it biodegradable chain oil from renewable raw materials for year-round use, and it does not name OECD 301 B or a percentage. SAE 10W-40 and medium to high viscosity are on the table, and a spout is not confirmed. Size says 1 litre while unit count says 975.9265 millilitres, and the vehicle field lists cars and mowers as well as the chainsaw title. The six saved reviews are from France and Germany, so they are not UK opinion. At £22.95 per litre, and with that thin UK text, it is a brand-matched bottle only if you already want Makita oil and can live with the missing test name.
Pros
- Makita part 1910U0-9, titled as 1 litre
- Listing says renewable raw materials and year-round use
- SAE 10W-40 on the technical table
Cons
- £22.95 per litre, the dearest litre in this set
- 31 ratings and no UK review text in the file
- No named test, and the unit count disagrees with 1 litre
- The vehicle field is wider than a chainsaw
Best for: You want a Makita-branded litre and will check the saw manual rather than the vehicle field.
Less suitable: You want UK review sentences, a named test, or a lower price per litre.
Specifications
- Model
- Makita Biotop 1910U0-9
- Brand
- Makita
- Price
- ∼£23
- Customer rating
- 4.7/5(31)
- Volume
- 1 litre
- Price per litre
- £22.95
- Bio claim
- Renewable materials
- Season
- All year
- Pack
- 1 bottle
- Saws
- Chainsaw
Common questions
Does this listing name a biodegradability test?
No. The bullet says high-performance biodegradable chain oil based on renewable raw materials, for year-round use.
Are there UK review sentences in the saved listing?
No. The UK listing shows 4.7 from 31 ratings. The six saved reviews are from France and Germany.
Does the size field agree with itself?
Size and liquid volume say 1 litre. Unit count says 975.9265 millilitres. Price per litre uses the 1 litre size.
Our view
DD-Teck’s bottle is 100 ml at £6.29, about £62.90 per litre, with 4.6 from 750 amazon.co.uk reviews. The title says non-toxic bio mineral oil and names no OECD test, no CEC test, and no percentage. UK reviewers who expected a small bottle say it is enough for a mini saw used a couple of times a year, and one mentions rust protection. Several others thought they had ordered a litre, and one then bought a litre for less. The unit-count field says 6.0 millilitres, which conflicts with the 100 ml size, and the components line names a chain and guide bar. Viscosity is listed as high, with a sticky or tacky claim. It is a top-up for a tiny tank if you have read 100 ml before you pay, not a cheap litre of proven bio oil.
Pros
- 100 ml at a £6.29 shelf price
- 4.6 from 750 reviews
- UK reviewers use it on occasional mini saws
- Listing says tacky, all-weather oil
Cons
- About £62.90 per litre
- Bio mineral claim with no named test
- Easy to misread as 1 litre
- Unit count and included-components fields conflict with the title
Best for: A mini saw you run a few times a year, once you have confirmed the bottle is 100 ml.
Less suitable: A full-size tank, a price-per-litre comparison, or a form that asks for OECD 301 B.
Specifications
- Model
- DD-Teck 100 ml
- Brand
- DD-Teck
- Price
- ∼£6
- Customer rating
- 4.6/5(750)
- Volume
- 100 ml
- Price per litre
- £62.90
- Bio claim
- Bio mineral, no test
- Tack
- Tacky
- Season
- All-weather
- Pack
- 1 bottle
- Saws
- Gas, electric, battery
Common questions
Is this a 1 litre bottle?
No. Size and liquid volume say 100 ml. Several UK reviewers thought they had ordered a litre.
Does the listing prove it is readily biodegradable?
No. The title says bio mineral oil. It does not name OECD, CEC, or a percentage.
Why is the price per litre so high?
£6.29 for 100 ml is about £62.90 per litre. The unit-count field says 6.0 ml and was not used for that figure.
How we compared
Six amazon.co.uk listings were scored. There is no laboratory lubrication test. The score is the star rating scaled to 70 points, plus up to 30 points from the review count. The top pick is the highest score. The Oregon twin pack ties that score and repeats the same review text, so it is not badged. The best value is the next 1 litre bottle that names a test on the listing, at £12.49. DD-Teck is about £62.90 per litre and is not the value pick. Makita has 31 ratings and no UK review text in the file.
1
Star rating
70%Stars divided by 5, then multiplied by 70. This is the amazon.co.uk star line, not a lubrication test.
2
Review count
30%Up to 30 points from the logarithm of the review count. The same review text on the two Oregon listings counts as one sample.
Independent review
Last updated: October 2026
8 sources checked
Bio chainsaw oil buying guide
Bar oil is a total-loss lubricant. Most of what the saw pumps out lands on the wood and the ground, which is why a biodegradable claim matters and why the waste is still hazardous waste. Start by confirming the bottle is bar-and-chain oil. Then read the test name, the volume, and the price per litre. The six listings below are the ones kept for this page. UK law does not require bio oil for every garden saw.
What is bio chainsaw oil?
Bio chainsaw oil is bar-and-chain lubricant sold as biodegradable. A petrol, corded, or battery saw pumps it onto the bar and chain, and most of it is flung onto the wood and the ground. It is not two-stroke mix and it is not engine oil. Petrol saws have two tanks. Battery and corded saws have an oil tank only. Confirm the bottle is bar-and-chain oil before it goes in the bar tank.
Best for
- Garden saws and firewood, where a reviewed 1 litre bottle is the usual buy
- Certified woodland, public contracts, and work near water, when you can keep a label that names the test
Not ideal for
- A form that asks for OECD 301 B if the bottle only shows a percentage or a bio-mineral line
- A mini-saw filler if the bottle is 1 litre and has no pour spout
Mistakes to avoid
- 1
Putting mix oil in the bar tank
A fuel-mixing bottle and two-stroke oil are different products. Petrol saws have two tanks. Battery and corded saws have an oil tank only. Bar oil goes in the oil tank.
- 2
Reading 100 ml as a litre
DD-Teck is 100 ml at £6.29, about £62.90 per litre. Several UK reviewers thought they had ordered a litre. The unit-count field says 6.0 millilitres, which conflicts with the 100 ml size. Use 100 ml.
- 3
Counting the Oregon two-pack as a second test
Both listings are part O10-6362 and the saved review wording matches, including 4.8 from 13,667 ratings. The two-pack at £22.26 is the same £11.13 per litre. It is one sample.
- 4
Leaving the wrong oil in the tank
Do not leave kitchen oil in the tank over winter, and do not use discarded engine oil. HSE INDG317 says check lubrication before work and through the day. Waste bio lubricant is still hazardous waste.
What to weigh up
Named biodegradability test
HighRead the test, not the word bio. On these listings, only Liqui Moly part 1280 prints OECD 301 B. That is the test Defra names for public buyers, together with OECD 201, 202, and 203. The brand sheet also says more than 98% after 21 days. Keep that 21-day line separate from the 28-day OECD test. Stihl’s UK safety data sheet names OECD 301 B, and stihl.co.uk adds Blue Angel and the EU Ecolabel. The amazon.co.uk BioPlus bullets say quickly biodegradable and do not print the test name.
Volume and price per litre
HighMatch the volume to the work, then compare price per litre. The kept sizes are 100 ml, 1 litre, and two 1 litre bottles. A litre is the usual garden buy. Oregon reviewers say the 1 litre bottle has no pour spout, so a mini-saw filler wastes oil, and uncoloured oil is hard to see in a sight glass. DD-Teck is the 100 ml bottle, £6.29 on the shelf and about £62.90 per litre. Several reviewers expected a litre. The unit-count field says 6.0 millilitres, so use the 100 ml size line.
Which option suits you?
Three typical situations, each with a recommendation from this comparison.
Contract, pond, or certified wood
A contract, a pond, or a UKWAS wood needs OECD 301 B or an EU Ecolabel, and you should keep the label. Liqui Moly part 1280 names OECD 301 B on the listing at £12.49. UK law does not require bio oil for every garden saw.
Occasional mini saw
A mini saw needs a bottle you can pour, and 100 ml is not a litre. DD-Teck is £6.29 for 100 ml, about £62.90 per litre, with no named test. Buy it only after you have confirmed the size.
Common questions about bio chainsaw oils
What is bio chainsaw oil?
Bio chainsaw oil is bar-and-chain lubricant sold as biodegradable. A petrol, corded, or battery saw pumps it onto the bar and chain, and most of it is flung onto the wood and the ground. It is not two-stroke mix and it is not engine oil. Petrol saws have two tanks. Battery and corded saws have an oil tank only. Put this oil in the bar tank, not in the fuel.
How much does bio chainsaw oil cost in the UK?
On these amazon.co.uk listings, Oregon is £11.13 per litre, and the two-pack is the same rate at £22.26. Liqui Moly is £12.49. Stihl BioPlus is £17.89 on Amazon, while stihl.co.uk showed £12.13 per litre including VAT. Makita is £22.95. DD-Teck is £6.29 for 100 ml, about £62.90 per litre. A litre is the usual garden buy.
Does UK law require bio chainsaw oil for a garden saw?
No. UK law does not require bio oil for every garden saw. UKWAS asks for biodegradable cutting-chain lubricant where practicable on certified woodland. Defra’s 2015 Government Buying Standard binds public buyers to OECD 301 B plus OECD 201, 202, and 203. A shop percentage is not that standard. When mineral bar oil is still reasonable is set out in the chainsaw oil comparison.
Does 97% biodegradable mean OECD 301 B?
No. Oregon’s listing says 97% biodegradable and does not name OECD 301 B. The Oregon catalogue for O10-6362 cites CEC L-33-A-94 and up to 98% in 21 days. Those are different statements. Defra’s public-buying standard names OECD 301 B plus OECD 201, 202, and 203. Do not treat the 97% line as meeting that standard.
Is the Oregon two-pack a separate review sample?
No. Both Oregon listings use part O10-6362, and the saved review wording matches, including 4.8 from 13,667 ratings. Treat that as one sample. The two-pack is £22.26, which is £11.13 per litre, the same rate as the single bottle. This listing does not repeat the anti-fling line, and one bullet says 1 litre while the title says a pack of two.
Is the DD-Teck bottle a litre?
No. Size and liquid volume say 100 ml. Several UK reviewers thought they had ordered a litre. £6.29 for 100 ml is about £62.90 per litre. The unit-count field says 6.0 millilitres and was not used for that figure. The title says bio mineral oil and names no OECD test, no CEC test, and no percentage. Read 100 ml before you pay.
Can you pour leftover bio chain oil away?
No. Oil Care treats chain oil as total-loss use, and waste bio lubricant is still hazardous waste. Do not pour leftovers away. HSE guidance says check lubrication before work and through the day, and do not use discarded engine oil. A container of 200 litres or less sits outside England’s oil-storage rules. Get help if a spill reaches water.
Our verdict
Six amazon.co.uk listings, with no laboratory test. The Oregon O10-6362 1 litre bottle has the highest score, 4.8 from 13,667 reviews at £11.13, and the listing’s 97% line is a percentage, not OECD 301 B. The twin pack ties that score and repeats the same review text, so it is the same sample. Liqui Moly part 1280 is the best value among 1 litre bottles that name a test, at £12.49. DD-Teck is about £62.90 per litre and is not the value pick.
Best overallView offer
Oregon O10-6362 1 litre
Highest score on stars and review count, at £11.13 per litre, when a named OECD test is not required.
Best value
View offer
Liqui Moly 1280 1 litre
The next 1 litre bottle that names OECD 301 B on the listing, at £12.49.
Editorial
Editor, DIY & tools
DIY & toolsForestry toolsChainsaw bar oil
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Updated: October 2026
8 sources checked
Guides to bio chainsaw oils
Guides on what to look for, how to use a product, and common mistakes.
Bio chainsaw oil buying guideTank, test name, volume, tack, and price per litre before you buy.Best bio chainsaw oilWho each kept bottle is for, and when to skip 100 ml.How to use bio chainsaw oilFill the bar tank only and confirm the chain is wet.Bio chainsaw oil vs mineralWhen mineral bar oil is still reasonable, without ranking these six bottles.Bio chainsaw oil for woodlandUKWAS, public contracts, ponds, and waste.
Related comparisons
Sources
Public UK sources and manufacturer pages, plus amazon.co.uk listing details from saved listings dated 21 October 2026. This is not a laboratory test.
- UKWAS, Woodland operations (retrieved 21 October 2026)
- Defra, Government Buying Standards for hydraulics (2015) (retrieved 21 October 2026)
- HSE INDG317, Chainsaws at work (retrieved 21 October 2026)
- Oil Storage (England) Regulations 2001, regulation 2 (retrieved 21 October 2026)
- Oil Care, biodegradable lubricants (retrieved 21 October 2026)
- Stihl UK BioPlus (retrieved 21 October 2026)
- LIQUI MOLY Bio Saw Chain Oil (retrieved 21 October 2026)
- Oregon O10-6362 biodegradable chain oil (retrieved 21 October 2026)
Expert source (DIY & tools): Charlie White (Charlie DIYte) (external profile) – public expert commentary used as a research source, not as a contributor to our pages.
This page contains affiliate links. If you buy through them, we may earn a small commission at no extra cost to you. The ranking follows the published method and is not set by the commission. The tag on amazon.co.uk links is pcuk26-21.