What grade Octane should we use

^^^ i doubt many know what cam2 is. god i love the smell of that stuff. nothing like a 455 passing u by burning cam2

[3.4 Euro Alero]

If anyone still cares, it is a proven fact by 3 different dealerships here in the Ottawa area that the majority of newer 3400 engines actually prefer and runs smoother on 87 octane. I am one of those guys who liked to run HighTest all the time, but found my first 3.4 was a little rough and sometimes difficult starting. GM tech's and foremen have no idea why, but it just doesn't like 93 for some odd reason. Both of mine have run better on 87, but car to car, each is different.

wht you need to do is add 20 % nitro to your fule lol

here in mich most of the gas stashon sell the stuff with ethonal in it.

[AlbinoMonkeyRat]

I use 89 when I know I'm going on the thruway, because I do get better mileage that way. But when I know I'm NOT going to use the thruway, I'll use 87, just because it's cheaper.

Back in December when I drove out to CT (about 400 miles away) I only stopped once and had about 3/4 of a tank left when I arrived. So figure, that's about 300 miles per tank. Not bad on a stock 2.4 doing well over 80 mph the whole way. But on 87, I get about 200-250 miles per tank. Must be all that idle burning. :unsure:

I use mid-grade (89 octane) unleaded. Around here it is the same price or cheaper that regular, because in the midwest they push ethanol (the corn blend). As far as people saying ethanol is bad for cars, well you were right. I can't remember where (I want to say Car and Driver, but I might be wrong), did a huge article about it. When they first started making ethanol blended gasoline, it caused vapor lock and had an adverse effect on the quality of your intakes and such. They refined their processes now where ethanol burns cleanly and effeciently without causing damage to your engine.

Jon

P.S. That Shell V-Power crap that they sell as their premium grade now, sucks.