09-07-2021, 07:45 PM
I think the biggest concern over E10 fuel is not how well or otherwise the engine runs, but what damage it is slowly doing to rubber and alloy components in the fuel system. The problem is going to be proving, or otherwise, that the ethanol content is the culprit and not some other factor, like old age.
There's no doubt that modern fuel doesn't keep fresh as long as it used to, and that is being blamed, probably incorrectly, on the ethanol, which will also give rise to running problems on little-used cars (and mowers, chain saws, etc). I have encountered more fuel issues in the last five years than I have in the previous fifty, but have no knowledge or means of identifying the root cause.
There's no doubt that modern fuel doesn't keep fresh as long as it used to, and that is being blamed, probably incorrectly, on the ethanol, which will also give rise to running problems on little-used cars (and mowers, chain saws, etc). I have encountered more fuel issues in the last five years than I have in the previous fifty, but have no knowledge or means of identifying the root cause.