Originally Posted by bri3d
On the other hand, the ethanol is almost certainly not hurting anything besides a marginal hit to your mileage as long as it's quality - cars built in the last 20 years were designed with E10 gas in mind and have E10-resistant hoses/pumps/injectors/seals. The risk with E10 gas (and why it still gets a bad rep) is that it becomes unstable and picks up water over time, so a station that doesn't get filled frequently or has poorly sealed tanks will deliver bad gas that can cause damage.
I always buy from stations that move a lot of gas, so my only concern is what I put in bold.
Can anyone else "in the know" back
bri3d up here? I still worry about the effect of E10 on cars that sit a lot (like you poor guys up north or my Red one which is being driven about 100 miles a month now, waiting for a buyer!)