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WIth my 245 M47 I usually get about 28mpg highway. It's hilly around here, and I go about 65-70. I try never to accelerate up hill, in fact letting the speed drop slowly up hill saves.
My 745 M46 gets about 26.5 highway, and I think it's due to the 3:71 rear in it as opposed to the 3:31 in the 245. My 245 automatic gets about 26, it has a 3:54 rear. Engine speed has a big effect.
Only way I can get over 30 is to draft a semi, then it goes to 31-33.
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84 242Ti IPD bars&springs, 89 745 16v M46 IPD bars, 89 744 16v M46 IPD bars, 90 745 AW70, 91 245SE AW70 IPD bars, 93 245 CLassic M47
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