WELCOME TO THE STIHL BLOG HOME HINTS & TIPS EXPERTS PRODUCTS NEWS REVIEWS EVENTS TIMBERSPORTS® MOW HOW 23RD JUNE 2021FEATURED POST, PRODUCTS How Will The New E10 Petrol Affect Your STIHL Chainsaw We know there are many debates taking place right now about E10 petrol and how it will affect petrol tools. According to www.gov.uk, E10 petrol will become the standard grade in the UK from summer 2021. E10 petrol will contain up to 10% renewable ethanol. This is intended to help reduce CO2 emissions, but we know that some of you may have concerns about how this will affect your petrol tools. We recommend in all of our owners’ manuals that you should only use high-quality brand-name petrol with a minimum octane rating of 90, but we can reassure you that petrol with an ethanol content of 10% or less, like the new E10 petrol will not cause a problem with your STIHL petrol tool. In fact, our STIHL M-Tronic engines can still deliver full power when run using petrol with an ethanol content of up to 25% (E25). However, petrol with an ethanol content of more than 10% can cause running problems in engines with a manually adjustable carburetor so should not be used in such engines. As with any petrol, we would still recommend not storing your machine with E10 petrol in it, to avoid any blockages in the fuel delivery parts of the tool. We also recommend that you store E10 fuel for no longer than 30 days in order to minimize the degree of fuel segregation. This is where the moisture in the air binds with the ethanol and settles on the bottom of the canister. This can cause running problems and shaking the container does not completely resolve fuel segregation. In some tools, it may also be necessary to readjust the carburetor to compensate for the changed composition of the fuel. We recommend that you visit a STIHL Approved Dealer for this. Of course, if you are concerned about the use of ethanol in your machines, then you can always consider our premium, patented fuel formula, MotoMix. STIHL MotoMix is completely free from ethanol and has virtually no olefins or aromatic compounds. Emission-wise, this makes it a cleaner, more environmentally-friendly choice than regular fuels, plus it lasts longer so you can store it for up to 5 years, which is handy as MotoMix is available in 200 litre drums! However, if you still want to use standard petrol, we are happy to reassure you that the new E10 petrol is fine to use in your STIHL petrol tools. You can search for the Instruction Manual for all current STIHL tools and some older versions here if you want to check any fuel recommendations. Let us know in the comments if you have any further questions. SHARE: RELATED POSTS THE DIFFERENCE BETWEEN 2-STROKE AND STIHL 2-MIX ENGINES MAY 14, 2020 6 REASONS WHY STIHL MOTOMIX IS THE FUEL FOR YOU FEBRUARY 19, 2019 E10 FUEL AND STIHL MOTOMIX – FREQUENTLY ASKED QUESTIONS OCTOBER 28, 2021 13 COMMENTS JAMES WYETH 24th June 2021 at 8:52 am REPLY Thanks for the advice. STIHL GB 24th June 2021 at 9:02 am REPLY You’re welcome! Let us know if you have any other questions. RICHARD GREEN 25th June 2021 at 10:17 pm REPLY Why don’t you make a product like Briggs and Stratton fuel fit, fuel fit works – fact. STIHL GB 29th June 2021 at 8:42 am REPLY Hi, thanks for your comment. We make our own stable fuels – MotoMix and Moto4Plus, which are a combination of premium fuel and premium oil, and are formulated to be the ideal fuel for STIHL machines. Thanks, STIHL GB DANIEL LEE 26th June 2021 at 7:52 am REPLY A list of stihl machines, past and present, that can and can’t take e10 fuel would be useful. STIHL GB 1st July 2021 at 3:45 pm REPLY Thanks for your comment. All STIHL machines should be able to take E10 fuel, however, some may need an adjustment to the carburetor to compensate for the changed composition of the fuel. We recommend that you visit a STIHL Approved Dealer for this. Thanks, STIHL GB GARY AYRE 17th July 2021 at 3:59 pm REPLY Where can I order MotoMix STIHL GB 19th July 2021 at 12:10 pm REPLY Hi, thanks for your comment. You can order MotoMix from any of our STIHL Approved Dealers. You can find your nearest one here: https://shop.stihl.co.uk/pages/dealer-locator Thanks, STIHL GB RHETT BARTLETT 4th August 2021 at 9:37 pm REPLY Hi there. Do you think my km94 rc kombi engines will be okay or would they need carb adjustment? I use the green hp ultra oil. Or would it be best going down the super unleaded route ? Thanks STIHL GB 12th August 2021 at 2:08 pm REPLY Hi, thanks for your comment. The new E10 fuel will be fine to use in your KM 94 RC. You may need to do a carb adjustment but only if it doesn’t run right after the switch. The KM 94 has been used globally for many years on E10 fuel so hopefully that will reassure you. Thanks, STIHL GB COLIN KENNY 3rd September 2021 at 8:14 am REPLY Hi, The research that I have carried out suggests that bioethanol used in E10 fuel can cause degrading of rubber and plastic components such as fuel pipes, diaphragms etc. Would you please confirm if my brushcutter or chainsaw, both of which are over 5 years old, would be effected. Thanks STIHL GB 3rd September 2021 at 10:31 am REPLY Hi, thanks for your comment. It is possible that in very old machines E10 may have adverse effects. But this was changed 18 years ago, so it is very old equipment where there could be some adverse effects. Either way, we always recommend that fuel is not stored in the machine for long periods. Thanks, STIHL GB KEN ADDISON 5th September 2021 at 6:22 pm REPLY Hi, Do you think my old Stihl 051 & 044 chainsaws will be ok or need some adjustments. LEAVE A COMMENT Name (required) Mail (required) Website Save my name, email, and website in this browser for the next time I comment. Please enter an answer in digits: five + 7 = « PREVIOUS POST HOW TO GET RID OF GARDEN PESTS AND DISEASES NEXT POST » HOW THE LEICESTER TIGERS GROUNDS CARE TEAM ARE USING STIHL SMART CONNECTORS WELCOME THANK YOU FOR VISITING THE STIHL GB BLOG. Here you’ll be able to find useful seasonal advice from experts and guest writers, along with the latest news from the world of STIHL and the great outdoors. In addition, we’ll keep you informed about our latest products and how to make the most of your tools – all so that you can make the most of your outdoor space. WHERE TO BUY Find your nearest STIHL dealer POPULAR POSTS How To Perform An M-Tronic Reset 21st September 2018 Hear, hear! 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