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

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

Question type: General

4 Answers

104,085

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.

102,155

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

4,385

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.

35,515

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

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,563 nationwide Grand Prix listings starting at $1,450.

ZIP:

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,460
  • #2
    Tom Demyan
    Reputation
    3,070
  • #3
    munron
    Reputation
    2,490
View All

Related Models For Sale

Used Chevrolet Impala
555 Great Deals out of 35,035 listings starting at $1,495
Used Pontiac Bonneville
465 listings starting at $3,499
Used Chevrolet Monte Carlo
8 Great Deals out of 1,207 listings starting at $1,488
Used Chevrolet Camaro
443 Great Deals out of 31,342 listings starting at $3,550
Used Pontiac Grand Am
1,025 listings
Used Ford Mustang
566 Great Deals out of 36,312 listings starting at $1,500
Used Chevrolet Malibu
1,022 Great Deals out of 64,105 listings starting at $880
Used Pontiac Firebird
11 Great Deals out of 762 listings starting at $2,500
Used Nissan Maxima
309 Great Deals out of 22,470 listings starting at $1,200

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
8 Great Deals out of 387 listings starting at $1,750
2007 Pontiac Grand Prix For Sale
3 Great Deals out of 363 listings starting at $2,295
2006 Pontiac Grand Prix For Sale
430 listings starting at $3,200
2005 Pontiac Grand Prix For Sale
336 listings starting at $1,450

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.