'98 GMC Suburban

Discussion in 'GM' started by t_haynes, Jan 2, 2013.

  1. phoebeisis

    phoebeisis Well-Known Member

    Mine too-I'll check today-but I think I'm generally in the high 20's
    If it runs ok-I wouldn't worry about the timing
  2. t_haynes

    t_haynes Member

    This is pretty much what I have decided. For the time being, I am chalking the drop in fuel economy off as combination of things. The transmission and assorted drive line frictional losses are higher because of the cooler temps. The winter blend of gas may have been part of it. I probably picked up some gasohol on the trip. I can see how things are when it warms up a little. The snow tires go on today, so that throws a new variable in the mix.
  3. 08EscapeHybrid

    08EscapeHybrid Moderator

    Yeah, mileage will drop in the winter, cold temps, winter fuel, etc. If you turn on the 4wd, expect 10 MPG at best. A few years ago I had one tank that was all snow driving with 4wd on. I think I got like 5 or 6 MPG on that tank.

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