Did I just read the GTP requires Hi-Test ?? I'm about to purchase a pristine '99

Bill Walter
0

Asked by Bill Mar 11, 2013 at 11:08 PM about the 1999 Pontiac Grand Prix 2 Dr GTP Supercharged Coupe

Question type: General

4 Answers

tennisshoes
19,955

For optimum performance and fuel mileage high test is recommended. You can use regular but don't do any high performance driving or you could blow a hole in the pistons. I'd say bite the bullet and use premium.

tenspeed
50,685

Try both grades and use the type that gives you the best miles per gallon.

munron
865

No, do not choose your fuel for miles per gallon! That's not what its for. Use the fuel recommended by the manufacturer, which in the case of the GTP is midgrade or premium. Check the owner's manual for your specific application to be sure. The correct fuel helps the engine operate at the corrrect temperature and that is necessary for the overall health of your engine.

John Saffrahn
15,235

Low grade fuel in a forced induction engine or an engine with a high compression ratio will cause predetonation. Predetonation can bend rods if it detonates early enough.

Your Answer

Related Questions

Grand Prix
Looking for a Used Grand Prix in your area?
CarGurus has 5,673 nationwide Grand Prix listings starting at $1,993.
ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 1,500
#2 Tom Demyan
Tom Demyan
Reputation 1,180
#3 John Saffrahn
John Saffrahn
Reputation 790
View All

Related Models For Sale

Used Chevrolet Impala"
2,176 Great Deals out of 58,122 listings starting at $1,195
Used Pontiac Grand Am"
83 Great Deals out of 2,813 listings starting at $791
Used Pontiac Bonneville"
44 Great Deals out of 1,186 listings starting at $699
Used Chevrolet Monte Carlo"
94 Great Deals out of 2,680 listings starting at $1,750
Used Ford Mustang"
1,077 Great Deals out of 26,836 listings starting at $1,895
Used Chevrolet Malibu"
1,641 Great Deals out of 61,873 listings starting at $1,940
Used Chevrolet Camaro"
726 Great Deals out of 30,809 listings starting at $2,800
Used Honda Accord"
1,390 Great Deals out of 79,856 listings starting at $1,000
Used Nissan Maxima"
709 Great Deals out of 20,216 listings starting at $946
Used Nissan Altima"
1,704 Great Deals out of 73,679 listings starting at $1,250

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
46 Great Deals out of 756 listings starting at $3,800
2007 Pontiac Grand Prix For Sale
47 Great Deals out of 762 listings starting at $3,500
2006 Pontiac Grand Prix For Sale
54 Great Deals out of 792 listings starting at $3,450
2005 Pontiac Grand Prix For Sale
25 Great Deals out of 650 listings starting at $2,800
2004 Pontiac Grand Prix For Sale
39 Great Deals out of 915 listings starting at $2,000