Slow loss of mpg

Talon

Well-known member
Joined
Mar 17, 2015
Location
Wisconsin
TDI
2003 Jetta Wagon ALH, 2013 tdi sportwagen
I have a manual ALH Jetta wagon that I've put about 160k miles on. I've noticed that over that time I have gone from 49 mpg by the tank full to about 42 mpg. I drive the same places each week with the same driving style. Any suggestions on what to check?
 

Nero Morg

Top Post Dawg
Joined
Oct 19, 2017
Location
OR
TDI
2014 A6 TDI, 2001 Jetta TDI, 2014 Passat TDI
I'd start here. It's probably one or more things listed here.
 

Talon

Well-known member
Joined
Mar 17, 2015
Location
Wisconsin
TDI
2003 Jetta Wagon ALH, 2013 tdi sportwagen
Thank you sir. I'll look into the items you outlined in the article.
 

TPW

Veteran Member
Joined
Dec 2, 2017
Location
Minnesota
TDI
2003 A6 Avant BHW 6 speed manual, 2003 Golf ALH 506k miles, 1986 Audi 5000 Quattro 5 Cylinder Turbo Diesel
Sub zero weather and number one diesel will lower MPG's a little bit. I notice mileage drop when my engine doesn't get up to temperature.
 
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