Couldnt find anything about it, but I'm a soldier stationed in Germany and have an 08 SS/TC at the pump over here it seems all I can get is either SuperE-10 (which is the 10% ethanol at 95 octane) or diesel at the pumps....obviously I'm not going to use diesel, but how bad is E-10 going to be on my motor since I'll be in Germany another 2 years before I get back to the states? would it be advised I travel somewhere else to get regular superplus fuel (93-95 octane)?

 

E10 is pretty much normal. Youll be fine running it. I believe almost all grades here have up to 10% ethanol blend in them. watch for 20-30-50% blends. some areas do sell it mixed like that. These mixes you will need to be tuned for. The car would run rough due to fuel trims being skewed postive

 

just the answer I was looking for, Thank You

 

it should be fine. Your fuel trims will be kinda wacky, but 95 octane and E10 will have almost no knock.

 

ran it for the last week cause I had no other option, no knocking from the motor, idk if it effects performance cause I dont have powersteering cause that damn recall that I cant get a part for over here, so once I get the power steering fixed I'll feel more comfortable seeing how the performance is affected

 

No problem!

 

Yep. Here in the states most fuel is e10.

 

Just so you're aware if you start to modify the car, the European fuel octane ratings are calculated slightly differently than the octane ratings in North America. They use straight RON (research octane) and in NA the formula is RON+MON/2 (research + motor octane/2). Due to the different standards between RON and MON (where RON is calculated and MON is a tested in a special single-cylinder engine designed to measure octane and knock resistance), they yield slight different octane numbers and the European 95-98 octane is actually pretty close to the pump premium 93-94 octane here in the states. So don't get caught up and try to tune the car thinking you're running some type of unleaded race gas.

As for ethanol blends, GM doesn't recommend E85 in the LNF but the owner's manual does state E10 is fine and as mentioned is pretty common. The slight ethanol mix helps with emissions and is less toxic than some of the older additives such as MTBE and MMT that were once used as oxygenates.

 

blackbird, thats good to know, thanks, I was wondering why the numbers were so high, when I was in Switzerland last summer I saw 103 at the pump and i was confused as crap, wondering what was being sold here (that was in a different car though, I just bought the cobalt)