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post #1 of 8 (permalink) Old 02-05-2009, 07:08 AM Thread Starter
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has anyone expierienced cold temps with your super duty i have the 7.3 and when i bought it i was gettn 15 solid then i put the dp tuner on and maybe 16 but since this winter hit im not sure if its the winterized diesel they sell here but i have lost about 175 miles to the tank now im gettn bout 10 but its been anywhere from 10 to 60 below zero and i was just wondering if anyone has the same issue
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post #2 of 8 (permalink) Old 02-05-2009, 12:15 PM
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i'll bet that has something to do with it.

Do you have alot of idle time? Short trips where the motor doesnt warm up?

At that temp, i'd be surprised if the engine ever gets up to full operating temp.

Winter blend diesel also will hurt your fuel mileage by 2-3 mpg by itself.

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post #3 of 8 (permalink) Old 02-05-2009, 12:39 PM
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yea same here, i mpg has suffered this year.. and if its -60 stay home lol.......

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post #4 of 8 (permalink) Old 02-05-2009, 01:16 PM
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If your ebpv stays on it will kill the fuel mileage robbing power, Idle time plays a big role it that 2 i left one of my trucks idling one day for 10 hours when it was -20 -30 hear so i could run to town if we got in a pinch for work i burned a half tank in 12 hours

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post #5 of 8 (permalink) Old 02-05-2009, 03:11 PM
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now what should normal operating temp be? HAVE 97 250
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post #6 of 8 (permalink) Old 02-05-2009, 10:36 PM
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At 60 below the air is very dense and your aero drag shoots up.

Don't idle too much. A light load will warm it up quicker. With a PSD, if the engine is running you have oil pressure.

Also people drive differently in very cold weather and that reduces MPG.

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post #7 of 8 (permalink) Old 02-06-2009, 04:25 AM Thread Starter
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yeah there is quite a bit of idle time at least i give it 20 min to warm up when i start it then i usually leave it running if i go somewhere unless i can plug in but when i drive it actually does get up to normal temp and the heater works great better than my gas car but i drive 50 miles to work so it has pretty good run time. does anyone run the #1 heating fuel in there rig i think im gonna start because it is so much cheaper i will just ad some howes lubricant and see what the mpg is
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post #8 of 8 (permalink) Old 02-12-2009, 10:13 PM
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For me, idle time depends on who's riding along. For me alone, I usually give it a minute or 2 and then just drive gently until she warms up. With the wife and kids, it's a lot more idling........
I agree, the winter fuel cuts your mileage. Just something we have to live with. Also, as Dave points out, the air is much denser than when it's warm.
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