There should be specialty spark plugs such as split fire, and specialty Air intake kits. Also check your owners manual. It should tell you about the different maintenance schedules to follow to keep it running at best efficiency. That alone may help MPG some.
The average gas mileage for a 1997 grand prix is 18-20 MPG in the city and 21 MPG on the highway..
I get around 25 City and almost 30 Highway
16 city, 25 hwy. will vary depending on the driver
A brand new Pontiac grand prix gxp gets around 19 miles per gallon on regular gas. In the city it gets sixteen and on the high way it gets around twenty five.
Posi?ætraction does not improve gas mileage nor does it decrease gas mileage. The traction does not come into play in less the pavement is wet.
ride a bike.
No
Trailer it.
Yes.
no
According to GM and www.feuleconomy.gov, the 2008 Pontiac Grand Prix has a 17 gallon gas tank.
My 2004 Grand Prix GT2 runs on 87 octane just fine.