Quote:
Originally Posted by andrewjtx
Trust me, I have.
Glow plugs are great / nearly new with <15k on them
All filters are regularly checked/changed
Valve adj was done <15k ago
Compression is good
start up (even cold) is great
No smoke
Good power / throttle response
Engine sounds great
My 30-mile RT commute each day is on a mixed speed road ranging from 45mpg-65mph with a few lights interspersed.
Brakes aren't dragging
The only things at this point I have not exhausted are:
Injectors
IP timing
Replacing the cheap Michelins
I'm also coming off a bout with non-optimal oil and flushing in a few rounds of 15w40. The next OC at 171,500 I will be doing another valve adj, timing chain check and replacing a few leaking seals (turbo return, filter housing). If those items don't show some improvement, I'll be pulling the injectors for Monarch nozzles and pop/balance testing.
I just starting running the A/C again and that's where I'm getting the 18mpg.
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What size tires? Wider tires will make a real difference due to resistance, and larger tires will make a perceived difference based on the math.
If larger, your odometer will read low, so will your speedometer; which sort of sounds like what you've got. Check the link for some example sizes and rotations/mile
http://www.buicks.net/shop/reference/tires.html
07-13-2010, 07:53 PM
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