Can it be used? Won't the computer adjust the timimg to compensate? If I did use it, it would be for around town driving. For highway I would switch back to premium. Or would the mpg in town drop significantly using midgrade?
It is a 1997 Eldorado.71, Go to the user CP up in the blue bar and update your profile with your car/model, year, mileage. It makes a difference because there were running changes to the ignition system, heads/cams, and block during the FWD Northstar production runs, all of which determine gasoline grade.
If your Fuel gauge or gas fill cover (?) say "Premium Fuel", then premium it is.
My '02 uses 87 very happily, and has no fuel mileage changes whether it gets 87 or 93.......and I drive the snot out of it.
YesCan it be used?
YesWon't the computer adjust the timimg to compensate?
You can use it on the highway as well. Use premium if you are going to race it.If I did use it, it would be for around town driving.
I ran 87 in my '97 Deville and noticed no mileage or performance loss at all.Or would the mpg in town drop significantly using midgrade?
I dont understand how premium fuel would give you more m.p.g., isn't the fuel "squirted" through injectors in the same amount,how would the computer know if it's prem. or reg?,just curious.I don't understand that. My '97 gave me 26+ on the highway all day long with 87.
If the Shell marketing guys could read this they'd be patting themselves on the back and high 5ing. :highfive:When i first got my 2000 seville i thout that it was bad gas making it run the way it was when i twas the plenum that was bad
but i called the dealer and talked to one of the mechanics and service guys there they said the northstar i have is desined to run on 87 if i do ever hear a knock just switch up to 93 for a little whyll and it will be fine
i have only used 93 one time and that was after the first 6000 miles i had the car and only used it becosue i thout it might help to keep it clean if i ran one tank of 93 v power threw it