The ethanol problem Since 2022, classic SP95 has nearly disappeared from European stations. What you find now:
SP95-E10 : up to 10% ethanol SP98-E5 : up to 5% ethanol Ethanol is an alcohol that attacks elastomer materials (rubber, Viton) used in seals, carburetor diaphragms, and fuel lines of small 2-stroke engines.
E10 damage on your engine Carburetor diaphragms swell and deform Fuel lines crack Gummy deposits in carburetor (varnish) Aluminum corrosion Which fuel to choose? Fuel Ethanol Recommendation SP98-E5 max 5% IDEAL — best protection/price balance Aspen 2T 0% PERFECT but expensive — made for small engines SP95-E10 max 10% ACCEPTABLE if consumed within 30 days E85 85% NEVER — guaranteed destruction
Best practices with E10 Use your mix within 30 days Add fuel stabilizer (5 ml per liter) Empty tank before storage over 2 weeks Inspect fuel lines every 6 months For complete mixing ratios by brand, check our full 2-stroke mixing guide .
L'Atelier knows the fuel specs for all Stihl, Husqvarna, Echo and Makita machines.
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