Question about 1997 Pontiac Grand Prix
The cleaner will not hurt anything. Your motor will just burn it up like fuel. I use the STP (red bottle) because it says on the bottle that it gets rid of condensation in the fuel tank. Condensation (water) does form and collects in the bottom of the gas tank. I use the fuel treatment 3 or 4 times a year and I think it really works. I have a 2001 Monte Carlo that I bought new and it has 177000 miles and it gets 34.5 mpg highway.I have been useing the fuel treatment from the beginning. It has the 3400 V-6.Its basically the same engine you have.
Also you must install a new fuel filter every 30000 miles. The tanks at the gas stations are filthy.
Also check the condition of your air filter and replace at 20000 max.
Transmission filter and oil at each 50-60000 miles.
I hope this info helps you.
Posted on Sep 24, 2009
I use sea foam in my se it brings back power and cleans everything out
Posted on Jun 28, 2012
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Posted on Jan 02, 2017
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