Highway driving I am getting around 14 M.P.G.? When is a tune up due? I do almost constant highway driving. It has 55,000 now on odometer? HELP IF YOU CAN:confused:

Should have had plugs changed at 30k. ND plug brand.

Thanks-- how about gas filter?

What you may be experiencing is "winter fuel"

The fuel filter is mounted on the frame rail. It seems little early at only 55K.

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