[Scoundreller]

So then do you fill up with E0 or E10 so you can fill up less frequently?

[mgkimsal]

Last... year or so I've been getting E85 when possible/convenient, and defaulting to regular 87 octane when E85 isn't available. Those tend to be the only reliably available options - haven't seen E10 around here. Last 6 months have been about 80% E85 and 20% 87 regular.

[BenjiWiebe]

In the US anyways, E10 is the regular gas. E0 (ethanol-free) is usually marked as being ethanol-free.