Sudden improvement in mileage

ranger pete

Veteran Member
Joined
Jul 29, 2011
Location
connecticut
TDI
2011 JSW 6MT
'11 JSW 6MT


Bought in mid april with 55K miles.


Have had a very steady 42-43 mpg since. Might have done 44 on an all hiway trip a few months ago.


The last 2 fillups have been 46, 44.

If anything, I have had more city driving.


Current mileage is 73K. (Yeah, I drive it a bit for work).



Could it be the warm weather?

I did rotate the tires around the time the mileage increased. Could that possibly have an effect?
 

lostru

New member
Joined
Aug 7, 2018
Location
Arkansas
TDI
2013 Golf TDI
Tire pressure adjustment can make a difference in mileage. Warmer weather can also due to the reduced time for the engine to reach operating temp. There are a certain amount of miles a diesel gets better. My 2006 F350 didn't really begin to really loosen up until 90K. Fuel milage began to inch up after that.
 

Mach1

Vendor , w/Business number
Joined
Sep 27, 2005
Location
Spicewood, Tx.
TDI
05.5 Jetta 5 spd, 06 Jetta DE DSG, 04 F250 6L, 2000 F250 7.3L
I could see an increase in FE from an increase in heat generated air pressure, I have the new fangled digital air pressure gauge and it is fairly close.

There is a sweet spot between the FE pressure and loss of ride quality pressure.

I run as much as I can without affecting ride quality, cause I live in the country down a dirt road. I use the wear pattern as a true test of air pressure level. If its too high you will see it in the middle of the tire thread.

Hope this helps..
 
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