Riddle me this...INCREASE in mpg! - Diesel Forum

bikepharmer · 03-06-2009, 12:21 AM

I filled up recently and hand calculated 24.5 mpg. I thought maybe I'd made a mistake and missed a reset on on the trip meter, but the next tank hand calculated out to 24.3 mpg. I have done nothing to warrant this, save for a rotation/balance of tires. Prior to this I was consistently getting 15-18mpg depending on driving situation. I use the same filling station, and will say that there was a touch more highway driving, but it is pretty strange to see this. Any explanations?

OMCUSNR · 03-06-2009, 10:53 AM

Quote:

Originally Posted by bikepharmer

I filled up recently and hand calculated 24.5 mpg. I thought maybe I'd made a mistake and missed a reset on on the trip meter, but the next tank hand calculated out to 24.3 mpg. I have done nothing to warrant this, save for a rotation/balance of tires. Prior to this I was consistently getting 15-18mpg depending on driving situation. I use the same filling station, and will say that there was a touch more highway driving, but it is pretty strange to see this. Any explanations?

I don't know what's going on, but I have to think something is wrong somewhere. A 4wd CC usually tops out at 20 / 21, flat road & a tailwind. Dave Whitmer has a 2wd that he's modified pretty heavily for aerodynamics, and he's topping out about 25.

Maybe some kid is adding 3 gallons when you're not looking?

OMC

Penhall · 03-06-2009, 11:24 AM

Time for your service station to re-calibrate their pumps? ;-)

BigBertha · 03-06-2009, 12:09 PM

Remember what our grandparents told us about having to walk to school. Well, any chance you are driving down hill with a tail wind coming and going.

Strokin' 6.0 · 03-06-2009, 12:24 PM

Maybe someone slipped a Cummins under your hood, when you weren't around?

Man, if I got that kind of mileage, I wouldn't look a gift horse in the mouth.

Could also be a change from winter fuel to summer fuel???? Maybe your station is getting their diesel from another supplier???

GAZ4x4 · 03-06-2009, 01:52 PM

Maybe your hand calculator got converted to kilometers!!!

OT · 03-07-2009, 12:16 AM

Bike..I betcha..pump shut off when 1st load of foam hit..then you figured mpg. If so....

Fill up till you see solid fuel in neck. Might take 10min. to accomplish that. Next fill up do same thing. Now..figure mpg. Still getting 24.3mpg..its a miracle.

btw..on second thought..is this a trick post..how fast were you going etc.?

firesoutmatt · 03-07-2009, 12:24 PM

It's gotta be the foam thing . It can take 4-6 gals more after the foam hits the nozzel. Or differnt size tires since this happen .

Chuckdogg6.0 · 03-07-2009, 09:29 PM

Wow...somthing is going wrong haha... Ive been keepin up with mine and lately ive been hittin between 16.5 and 18.4 dependin on how many rice burners i blow smoke on..haha

blackwaterstroker · 03-09-2009, 06:49 AM

man your lucky...I allways fill my truck up at the same station and I fill the truck up all the way to the neck and Ive recently have been getting 14.5 mpg driving my truck normal...

Chuckdogg6.0 · 03-10-2009, 06:01 AM

Guess i am lucky then. I just picked up a set of 2008 20's so i can say by by to them mpg numbers..ill be expecting 12-13