Greetings from a newbie This week I acquired a 2004 Crossfire and got to questioning what fuel to use but could not find a solid answer online. Mine is the base 3.2 litre V6. Can I run 87 regular, or should it be 89 plus or 93 high octane? Was not about to find the compression ratio handily online so I'm not really sure.

This is my first Chrysler. My other car is a Mercedes 380SL from 1985 and I'm a regular on the Benzworld.org forum. I also collect Studebakers and have had a couple Packards as well.

I know my r107 Benz runs on 87 regular, but the Studebakers have required higher octane depending on compression ratio and (in the case of the supercharged Avanti) 93 only.

What say you all?

-George-

 

This car takes PREMIUM Unleaded ONLY. 92 Octane (according to the manual). However if you can find 93 Octane, the better. Try to use the same "national" brand (Shell..BP..Mobile) each time you fill up. The chemical detergents vary from brand to brand.

 

Thanks! I also understand that the compression ratio is 10:1 which would explain this. 93 is readily available these parts. I've also been told that you can go as low as 91, however the only gas stations that have that rating are Sunoco, everybody else goes from 89 right up to either 92 or 93.

 

91 would be fine but as you said its pretty rare. There are also some that will say you're fine with a lower grade, but I say why chance it to save a few bucks? I only use Shell Vpower... if I can't find a Shell station, I'll only put enough gas in to get me to the next Shell station

 

Hello my name is Steve and Im also a "Shellaholic".

 

Generally, I stick with BP, (and hold my nose while doing so, considering what they did down in the Gulf...) but basically because it is a decent quality gasoline and always the lowest price per gallon where I buy fuel. If I can't get that I go for Shell....

My other car, a 1985 Mercedes 380SL seems to run the same regardless of which gas I put in it, BP, Shell or something else, and I always run a large bottle of Chevron Techron fuel system cleaner with each oil change and a large bottle of Techron Fuel Injector cleaner halfway between oil changes. That all seems to keep everything running nicely and smooth.

You can run lower octane thru a high compression engine once in awhile but if you do it all the time in the long run you will cause valve-burn and all the nastiness that goes with it...... But in a pinch you can get by, just always fill again with premium.

 

A good hint is the label on the fuel fill door, it says "use premium fuel only".