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
40,765

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
68,605

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

munron
1,995

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
22,335

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

Add photo
Grand Prix
Looking for a Used Grand Prix in your area?
CarGurus has 4,149 nationwide Grand Prix listings starting at $998.
ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 2,390
#2 Tom Demyan
Tom Demyan
Reputation 1,760
#3 John Saffrahn
John Saffrahn
Reputation 1,190
View All

Related Models For Sale

Used Chevrolet Impala"
1,452 Great Deals out of 52,995 listings starting at $600
Used Pontiac Bonneville"
5 Great Deals out of 751 listings starting at $2,200
Used Pontiac Grand Am"
6 Great Deals out of 1,933 listings starting at $1,995
Used Chevrolet Monte Carlo"
43 Great Deals out of 1,842 listings starting at $1,499
Used Chevrolet Malibu"
882 Great Deals out of 60,670 listings starting at $1,987
Used Ford Mustang"
658 Great Deals out of 31,355 listings starting at $1,399
Used Chevrolet Camaro"
483 Great Deals out of 30,869 listings starting at $977
Used Nissan Altima"
1,063 Great Deals out of 72,738 listings starting at $1,495
Used Nissan Maxima"
345 Great Deals out of 16,222 listings starting at $995
Used Jeep Grand Cherokee"
712 Great Deals out of 57,443 listings starting at $1,350
Used Honda Accord"
1,057 Great Deals out of 71,565 listings starting at $999

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
25 Great Deals out of 580 listings starting at $3,000
2007 Pontiac Grand Prix For Sale
23 Great Deals out of 532 listings starting at $3,499
2006 Pontiac Grand Prix For Sale
19 Great Deals out of 622 listings starting at $2,850
2005 Pontiac Grand Prix For Sale
17 Great Deals out of 497 listings starting at $1,500
2004 Pontiac Grand Prix For Sale
18 Great Deals out of 647 listings starting at $998