OT-Unexplained Mileage Increase

Posted by farmer boy on August 28, 2010 at 05:45:41 from (76.66.239.27):

A couple months ago i posted about a 1997 GMC Sierra 305 that was getting terrible mileage. About 10 miles per cdn. gallon. Had to drive it about 15 miles to work every day so it was affordable but still an unneeded expense. The truck only ran at about 160F so i replaced the thermostat with a 195F and no difference in temp. I left it that way for a while but I decided about a week ago i would try blocking 2/3 the rad with some cardboard. Didn"t want to cover more because of the trans cooler. I ran it around the block. Total of about 6.5 miles. First 3 miles I ran it easy like normal but the temp didn"t go up at all so i ran it as hard as I could and finally got it up to 175f but it wouldn"t go up any higher. Now the truck is getting 16.5 to 17.5 mpg and would get better because quite a few of those miles were with 7-800 lbs in the bed.and a few 2 mile trips.Any idea what would cause the mileage increase? Would running it hard help somehow?

Replies:

• Re: OT-Unexplained Mileage Increase 36 coupe 05:29:03 08/31/10 (0)
• Re: OT-Unexplained Mileage Increase buickanddeere 18:27:06 08/28/10 (0)
• Re: OT-Unexplained Mileage Increase Ed The Wine Farmer 18:06:36 08/28/10 (0)
• Re: OT-Unexplained Mileage Increase Inno 11:57:50 08/28/10 (0)
• Re: OT-Unexplained Mileage Increase John M 09:23:40 08/28/10 (0)
• Re: OT-Unexplained Mileage Increase ASEguy 09:18:37 08/28/10 (0)
• Re: OT-Unexplained Mileage Increase MSM 08:56:44 08/28/10 (2)
  • Re: OT-Unexplained Mileage Increase farmer boy 10:13:09 08/28/10 (1)
    • Re: OT-Unexplained Mileage Increase MSM 10:28:14 08/28/10 (0)
• Re: OT-Unexplained Mileage Increase Stuart 07:46:43 08/28/10 (0)
• Re: OT-Unexplained Mileage Increase camju 07:21:56 08/28/10 (0)
• Re: OT-Unexplained Mileage Increase farmer boy 07:19:32 08/28/10 (0)
• Re: OT-Unexplained Mileage Increase dave2 07:00:53 08/28/10 (0)
• Re: OT-Unexplained Mileage Increase TomH in PA 06:47:47 08/28/10 (1)
  • Re: OT-Unexplained Mileage Increase Bob 07:15:47 08/28/10 (0)
• Re: OT-Unexplained Mileage Increase Revredneck 06:38:02 08/28/10 (0)
• Re: OT-Unexplained Mileage Increase Brian G. NY 06:04:54 08/28/10 (0)
• Re: OT-Unexplained Mileage Increase Janicholson 06:00:58 08/28/10 (0)
• Re: OT-Unexplained Mileage Increase CJ_1080 06:00:52 08/28/10 (0)
• Re: OT-Unexplained Mileage Increase Allan In NE 05:52:04 08/28/10 (0)

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