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post #1 of (permalink) Old 02-12-2002, 06:57 PM
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6.5 TD gas mileage

I have a 95 6.5 TD and am only getting about 11 mpg in town. I dont do any highway driving, just in town but I'm pretty sure I should be getting better than this. Whats wrong?

95' K2500 6.5L TD
6" Pro-Comp lift w/ triple hoop shocks, 35x12.50 Pro-Comp Mud-Terrain, 15x10 Weld racing rims, skidplate, K&N filter
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post #2 of (permalink) Old 02-12-2002, 07:11 PM
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Re: 6.5 TD gas mileage

If you don't find out here you should try the Diesel Page, I think the address is http://www.thedieselpage.com

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post #3 of (permalink) Old 02-12-2002, 07:37 PM
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Re: 6.5 TD gas mileage

That's bad, you should get 18 about all the time. Unless you got a powerchip and a leadfoot? Oh and 18+ on the freeway/highway.

Rice burner's suck! Go Bigblock!!!
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post #4 of (permalink) Old 02-12-2002, 07:58 PM
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Re: 6.5 TD gas mileage

Well the first thing you need to do is quite putting gas in your diesel engine. Oil burners do not like gas.
With 4.10's expect about 14-16 in town, add +1-2 mpg ea for 3.73's and 3.42's. I get a low of 10-13 pulling my travel trailer, city 15 +/-1, a best on freeway of 18.2 from Seattle to Portland and back going 55 mph with cruise on. Otherwise I'm topping out in the 17.x range.
Your timing could be off, -1.94 is the best, injectors could be bad or dirty, injection pump not working correctly. Dirty/clogged fuel or air filter. Bad fuel, I have noticed differences between brands, and get better mpg's when purchased at one particular station here in town by over 1 mpg. Where do you live. You may have winter blend in the stations near you. Winter blends give you less BTU's per gal, hence less fuel mileage by about 1-2 mpg's, depending upon how much #1 is in the mixture.

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