I do have to agree with the last sentence completely. Have noticed an older engine am running on the highway for short getting around purposes is having some problems with the 10 percent blend. Don't want to get rid of a paid in full auto using for short trips ... around town or lose engine based on these flex fuels. I would go off on a rant if I lost that auto. The auto is nearing 200k and does not burn a drop of oil. Been a great vehicle. Being poor cannot afford these new autos with inflated pricing. I said I would not rant ... sorry. Thank you for your responses. You were most kind.
Not good to take chances on this.
Vehicles older than 1994 may be especially vulnerable. Ethanol will loosen up junk in the tank and lines that gets into the fuel filter, but ‘94 or newer vehicles (in good condition) should adjust to E10 blends after a tank or two.
I have a ‘91 GMC pickup with 200,000 miles that does fine on E10, but it’s been digesting it for years. The big V8 loses only a couple mpgs, so sometimes the price spread is worth it and sometimes it’s not.
And no ethanol blends in small engines unless the instructions say ethanol blends are OK.