Hi...


Anyone use Sunoco GT 100 Unleaded also under the CAM2 GTTM 100 label ?

Is this 100 octane gas OK for the Crossfire...?
...owner's manual says use 91 - 95 octane...


Thanks...

Dave...

 

No, that would be very bad for running on the street. It contains too many additives and detergents. Use regular, 91-95 octane on the road in your car. Higher octane will only hurt the car in the long run, not to mention void your warranty.

 

OK I am no mechanic but my understand is that running a higher octane will actually hurt performance if your engine is not setup for it.

my basic understanding is that to get above 95 octane you will need to advance your spark (timing), which can be done via reprograming your car and secondly your engine cannot handle the compression it will need for this octane rating. To increase compression you could either modify the head or add a device to increase air compression to it or I am sure there are a couple of other mods for this that are probably not worth the time/effort unless you are actually going to race this thing. If that is the case you would probably just want to gut the car and start with a V8 anyways...

-marc

 

Do a search.. I have posted a detailed explanation of fuel requirements before. Higher octane will not help your vehicle unless it is designed for it. Higher octane can cause driveability issues.

 

Thanks...


I'll try the Sunoco 93 or 94 octane... only 2nd fillup...

Anyone find the Xfire likes a particular brand/octane gas ?


Dave...

 

I think finding a certain brand/octane would be subjective. There are many different blends used across the country as well as the octane sold. You should be okay with just about anything with 91 octane or higher, right? I would, however stay away from those cheapo hole-in-the- wall gas stations.

Help me out here if I'm wrong on this.

 

Fuel tips:


Buy from stations that see heavy traffic- the tanks have a faster turn over rate.

Never buy from a station that has just had its tanks filled! (stirs up sediment)

Never buy from cheap hole in the wall looking places! Not that cheap brands are so bad.. just the tanks may be horrible shape.

Never buy from a station that has a line of cars around it- all dead! (sounds funny- but it happens here in FL from time to time. A tank ruptures- water intrudes- people pump in all that water and BLAM!! 15 dead cars before someone figures it out! Worse yet- The guy who fills the tanks in the ground leaves the fill port open- and it rains!))

 

So that's why there is a fuel drain on each wing tank of my Archer ???? I should put that on my checklist... ;-)
I try to stick with one brand all the time, Mobil in my case, when ever possible.
While the fuel comes from the same reffinery, each brand has it's own additives. And since the ECU is basically finetuning the engine all the time, I feel that making the fuel a more consistent factor, there is less changing of the settings required which should result in a minor improvement of performace/mileage.