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I have a 1994 Altima GXE with 156,700 miles. I got the car second hand with Michelin Energy tires which were inflated to 40 psi. That got me about 30 mpg. The ride was teeth chattering - not very comfortable :-)
As I started to check the car out, I realized that these tires were over-inflated. I dropped them down to 32 psi (still a lilttle hire than recommended). My milage dropped to about 28 mpg. Recently I got new tires - Michelin Pilot AS which I think are terrific for handling and all-weather. With the new tires I seem to be getting about 26-27 mpg.
Most of my driving is highway (85% highway / 15% city).
I had the car in for a tune-up (new wires, new plugs, new air filter, new fuel filter) and an oil change. Hoping I might get an mpg boost.
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