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Old 11-12-2012, 10:43 PM   #10
1985-GMC
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Join Date: Jul 2009
Location: Canyon Lake Texas
Posts: 2,024
Re: How fast does everyone cruise on the highway in their truck?

I went to Austin and back last weekend and nobody drives under 75 on I35. Most of the trip I was at 85 with a few times past 100, my 454, 4 speed, 4:10 gears and 245/75-16's. Usually I get anywhere from 7-9mpg around town but on the highway I got 10mpg. If I did the same thing and stayed at 75 it probably would have gotten 12. I was not easy on it at all, and I know this is not safe driving habits in a 34yo truck. I'll get a picture next time.
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1985 GMC K2500 restoration Project: Rust, White & Blue
1989 Chevy R3500 CC Cummins & 4X4 swap some day...
1989 Burb (D60, 14BFF, 12V, NV4500, NP205, 37" tires in progress)
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