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  1. 03 - 07 3rd Gen 5.9 Liter General Discussion
    Why does my 06 5.9 24v get 15mpg with NO LOAD, always now at mostly city driving? Highway is more like 17. My dads ford 250 6.7 1986 gets 25 highway all the time. WHATS UP DODGE!? 1. 06 5.9 24v, mega cab, 4wd, 130k miles 2. oil cap has zero blowby 3. stock rims, stock type AT tires 4. i just...
  2. 94-98 Powertrain
    So I bought my first diesel, a 1994 12 valve 4x4 today. I'm wondering what the best additives to use for fuel mileage are? I know that 2 stroke oil helps, but how much per tank, and does it matter if it's premium or not? Grateful for any help, thanks.
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