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Old April 3rd, 2012, 07:30   #3
SoTxBill
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Join Date: Dec 2000
Location: its not the base, its the additives!!
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Quote:
Originally Posted by mk5tdi View Post
Hey guys. I have a 2010 TDI Jetta and I swear that after I hit 10k miles my mileage improved about 2-3 mpg. I monitor it religiously. My wife has a 2011 JSW TDI which just hit 10k miles last week. We carpool to work and my drive is 99% highway - about 22 miles. The car hit 49.9mpg today - the highest amount I've seen on either of our cars for the trip to work. Her car normally averages about 43-44mpg. Any ideas if there is significance on the 10k? My friend is an engineer at GM and told me that on some of the older GM cars (he was specifically referring to his 96 Imapala SS) the car was programmed to put out an extra 10hp after the 10k mile break in. This sounds like total BS to me. Any input is appreciated.


bs... its just getting looser.. at 65k it will move up some more..
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