I have a hunch on why I get such bad MPG
Well, no, not really. The proper way is to drive the truck down to 1/8-1/4, record how many miles driven, then divide that by how many gallons it takes to fill back up.
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Wrong. You fill the tank noting the mileage, drive, refill and divide the number of miles driven it by the number of gallons it takes to refill the tank. It doesn't matter what size tank you have, just how many gallons it takes to refill it. It is better to drive it down to about a 1/4 tank and average your results over 3-5 tankfulls.
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Captain
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From: Georgetown Texas
Actually, it should unless it is near arctic outside. There's no way uncirculating coolant will hold at that low a temperature, and if the t-stat is not opening the coolant is not circulating. He either did not run the engine long enough to get it up to temperature before taking that reading or it is reading from a different point on the engine than where the t-stat is.
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Exactly right. The reason you need to run it down to a 1/4 or less is because there is less evaporation from 1/2 to full and that will skew your results.
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Captain
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From: Georgetown Texas
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From: peruvian mountains
and sorry about the typing i will type right here.. its just that here in ct some of us got lazy and a lot of people got used to that ( including me ).
it kinda throws me of now lol.
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Almost all internet forums frown on using cellphone text-speak in posts. As this is a technical forum, we prefer you don't. Also, finding the Shift key once in awhile is appreciated, too. Welcome to DF.
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You are running 265/75/16 and your stock size is 225/75/16.
Speedometer Difference: 8.063% too slow.
Have you re-calibrated your speedometer?
If not, you are traveling more miles than your odometer tells you.
http://www.1010tires.com/TireSizeCal...?action=submit
Speedometer Difference: 8.063% too slow.
Have you re-calibrated your speedometer?
If not, you are traveling more miles than your odometer tells you.
http://www.1010tires.com/TireSizeCal...?action=submit
Thread Starter
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Captain
Joined: Jul 2009
Posts: 566
Likes: 0
From: Georgetown Texas
You are running 265/75/16 and your stock size is 225/75/16.
Speedometer Difference: 8.063% too slow.
Have you re-calibrated your speedometer?
If not, you are traveling more miles than your odometer tells you.
http://www.1010tires.com/TireSizeCal...?action=submit
Speedometer Difference: 8.063% too slow.
Have you re-calibrated your speedometer?
If not, you are traveling more miles than your odometer tells you.
http://www.1010tires.com/TireSizeCal...?action=submit