Ok my question is with an 07 monte carlo if start using premium gas would it mess any thing up? some people have told me that in order for me to do that i would need to have the carburator re calibrated. Does my 07 3.5l v6 even have a carburator?

 

No But you will be wasting your money using premium with a 3.5 engine. Preium is used for higher compression engines either Carb or EFI.

 

what idiot told you that your car had a carburetor? i have to run premium in my car because of the engine and computer mods but with your stock 3.5 stick with regular and dont worry about what idiots try to tell you

 

lol at you having a carb. tell those people you have sequential port fuel injection and see what they say [8D]

As far as what gas to run- look in your owners manual. For a stock car- the engineers that designed it know better than anybody out there as to what gas it was designed to run on. When you start getting into mods, adding boost, cranking timing, etc- thats different. But I garauntee your owners manual says to run it on 87 octane.

If you're running knock free on 87 octane, and you put in 93 octane- you'll still be knock free and making about the same power, but spending more money. Maybe, once you rack up 150,000 miles and your engine is all gunked up with carbon and you start getting some knock- then maybe step up to 89 octane to get rid of it. But for now, you're fine with 87.

 

I don't know if I'd want those people working on my car...They'd probably service my air brakes or do a rear diff fluid service. LOL. I've run about three tanks of premium through my motor just to clean it out a little...I normally run midgrade because it's the same price as regular unleaded. Like Bumpin said, cars these days (with the exception of a few standard performance and high performance cars) are designed to run on 87 octane.

 

unit for unit, 87 has more power then 89 or 93.... the higher the number the harder it is to burn the fuel...and the more it resists igniting due to heat or high pressure... the reason 93 or higher is good in mod'd engines is cause you can run more boost or timing without detonating...(where fuel ignites before the spark plug goes off-pre ignition, or after the plug goes off...the rise it pressure causes the fuel to ignite before the actual flame front from the spark plug reaches that gas.)

 

[align=center]Premium Fuel - Do You Really Need High Octane Gasoline?[/align][align=center][/align][align=center]Click on below link to find out[/align][align=center][:-][/align][align=center][/align][align=center]http://www.automedia.com/High_Octane...cr20050501ok/1[/align]

 

Make sure that they don't want to fill up your blinker fluid or service your second transmission. )
Hey 'Space, good article! Keep up the good work.