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Old 02-13-2014, 08:24 PM   #1 (permalink)
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New Guy Intro (2003 Jetta TDI)

Hi All,

Looking forward to learning what you do for more MPG. I have a 2003 Jetta TDI Diesel and have been experimenting for a few years on how to raise up the efficiency. Best I've done so far was 57.4 MPG. Trying to break the 60 mark even in the hills of western PA.

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Old 02-13-2014, 09:03 PM   #2 (permalink)
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Welcome to the site Lane S. Your mileage is already pretty good so I assume your driving is fairly tweaked already. What mods have you done and what do you have planned?
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Old 02-13-2014, 10:10 PM   #3 (permalink)
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Welcome.

Quote:
have been experimenting
What things have you done?
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Old 02-13-2014, 10:31 PM   #4 (permalink)
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Welcome, blow up the tires and put some pipe insulation in the grille openings to block the grille.

regards
Mech
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Old 02-13-2014, 11:18 PM   #5 (permalink)
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Blue Jetta - '03 Volkswagen Jetta GL
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So far its just driving speed reduction, higher pressure in tires (90% of max), watching shift/rpms. I'm investigating the grill block and higher temp thermostat with Evans no water coolant (with 1st stage fan mod).

I'm getting ready for a 200K timing belt change and plan on replacing worn suspension, exhaust (2.5 or 3"), EGR, Turbo, and Intake cleaning for now. I'm sure you fellows will have some great suggestions.
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Old 02-14-2014, 12:08 AM   #6 (permalink)
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real good mileage. don't forget to start listing mileage logs.
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Old 02-14-2014, 01:38 AM   #7 (permalink)
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Old 02-14-2014, 08:51 AM   #8 (permalink)
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Quote:
Originally Posted by Lane_S View Post
Trying to break the 60 mark even in the hills of western PA.
Wow, that is a great goal. I drive through western PA a couple times in the summer & there are certainly a couple of doozy's. The worst so far is is I-40 East right past Uniontown. I have to throw my Corolla into 3rd gear with the pedal buried to maintain 45 MPH.

Already learning from reading here that is is better to lose a bit of MPH going up hills, but that is one climb that is tough to maintain speed.
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Old 02-14-2014, 09:45 AM   #9 (permalink)
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Quote:
Originally Posted by digital rules View Post
Already learning from reading here that is is better to lose a bit of MPH going up hills, but that is one climb that is tough to maintain speed.
that is true. there are no hills here but there is one overpass where i am that i end up cresting at about 35 mph.

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