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TDI Fuel Economy Discussions about increasing the fuel economy of your TDI engine. Non TDI related postings will be moved or removed.

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Old May 14th, 2019, 07:34   #31
Veteran Member
Join Date: Apr 2001
Location: Southeast Texas
Fuel Economy: 37 MPG (~ 45% city)
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Originally Posted by sloinker View Post
I can get over 60mpg in the summer going to work. I'ts a chore and 55-60 mph tends to anger folks on the 80mph freeway. The 51psi tires are a little harsh and the speed to merge is counted in minutes. If I run my aircon, drive normally at the 80mph limit, merge quickly, run my tires at 40psi I will get consistent mid 40's in the summer depending on wind and temperature. In the winter with cold temps, winterized diesel and snow tires I can consistently get upper 30's to low 40's. This is actually true for both my hatchback and sportwagen, both dsg's. My unfixed manual 2015 Passat managed a couple miles more per gallon but she is history with the buyback.
Good summary! I would venture to say this assessment is spot on for the majority of CR TDIs on the North American roads.
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Old Yesterday, 18:40   #32
Join Date: Apr 2019
Location: Rockford, IL

After driving how I normally drove for a day, and getting a piddly 39 mpg actual mileage, I went back to trying to drive for mileage. It turns my 50 minute drive into an hour drive, but it's worth it. With 470 miles on this tank, I show an indicated 57mpg average. I know actual mileage will be less, but still over 50 mpg. On top of that, I checked my tire pressure today and found they were all inflated to 35 psi. I filled them to 45 psi to see how much that improves mileage (51 psi is max on the stock Hankook tires). I'll get some idea tomorrow. I only drive 3 times this week, as it's my carpooling friend's turn to drive on Tuesday and Thursday, and I think I'll take the motorcycle on Wednesday, so I'll have about 700 miles on this tank when I fill it. Hopefully 14 gallons or less.

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