1995 Pontiac Grand Am Really bad Gas Mileage

Tiny
WOITEL3000
  • MEMBER
  • 1995 PONTIAC GRAND AM
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 141,000 MILES
Hello. I have a 1995 grand am with a quad 4. I replaced the plugs with bosch quadrupile platinum, new fram air filter, new plug boots, halvoline synthetic blend oil, new filter and some seafoam in the tank. I am getting 17 mpg at the best. I am very frustrated. I also have new tires all the way around. The MIL light does not come on, nor does any other light. I have ran diagnostics and everything is dandy. What could be causing this. I baby this car, and no one else drives it. I also get good gas. I think it might be the O2 sensor, but im not sure. Please help. Thanks! Please copy your answer and email me, if you are able to woitel3000@mchsi. Com. Anyone is welcome to respond
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Wednesday, November 12th, 2008 AT 8:35 PM

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Tiny
JNOVACK
  • MECHANIC
  • 723 POSTS
Change the plugs to the oem ac delco they do not need to be platinum and as for those quantum plugs they are no better then the oem but they will at times cause your gas milage drop
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Wednesday, November 12th, 2008 AT 9:45 PM

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