What grade gas?

[chubbyboy88]

I was wondering what grade of gas is best for my Alero?

[doubleN0alero]

87 works just fine unless you have significant engine mods that require a higher grade. I've found better mpg using 89, but thats just me and not to be the sworn by truth applying to everybody.

[AGT]

Mine always liked 103 octane. It ate it quicker so it must like it better :lol:

[chubbyboy88]

where do you ger 103 octane from?

[AGT]

track LOL

Honestly you won't need more than 87 or 89 if you are stock.

[doubleN0alero]

where do you ger 103 octane from?

The better question is where to get a new engine if you run this...

[chubbyboy88]

lol so I have a stock Alero 3.4 with a k&n air filter but will be adding mods in the Spring.So for right now 87 or 89 is pretty much good but when I add on more mods I need to put 93.Why do I need to put a higher grade fuel when I put in the mods anyway?

[doubleN0alero]

Even with the mods, it won't require a higher octane. Jackal2000 did a DHP pcm upgrade which required him to jump to 93.

[chubbyboy88]

ok so I should only put higher octane if the mod says it requires it?

[doubleN0alero]

I think the DHP is about the only thing that requires it, so you should be good with the cheap stuff.

[lonnie]

You only need a higher octane gas if you have a higher compression engine.

[[ion] C2]

*if you're producing a lot of heat that may cause pre-ignition

[undecided02]

honestly if your engine doesnt require more than 87 octane than you wont notice any change at all. it is all based around compression, and if your engine doesent require a change of gasoline than its not worth the extra cash you would pay for it.

[chubbyboy88]

Does anybody know where i can get a dhp for cheap and a cold air intake?

[cherrington17]

you don't need DHP if your only running a CAI, don't waste your money. rebuild the engine, get headers and a full exhaust, then go dhp. won't do much till then.


cheap CAI, go to ebay.