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  1. N

    4.0 XJ fuel mileage improvement - any ideas?

    Thanks for the replies. I really appreciate it. I'll take a look at some other XJs that are for sale & see how many mpg they get & see what to do then. If anyone has more ideas on how to get better mileage I'd still like to hear it.
  2. N

    4.0 XJ fuel mileage improvement - any ideas?

    Hi everyone. I found this stock 1991 4.0 XJ Limited with an automatic transmission for a reasonable price but the owner says it gets 11.5-13 mpg city. What with fuel prices over here in europe being 2x-3x what they are in America, I won't buy it unless I can improve the mileage significantly...
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