View Single Post
Old 01-26-2015, 11:01 AM   #84 (permalink)
COcyclist
Aero Wannabe
 
COcyclist's Avatar
 
Join Date: Dec 2007
Location: NW Colo
Posts: 738

TDi - '04 VW Golf
TEAM VW AUDI Group
90 day: 53.2 mpg (US)
Thanks: 705
Thanked 218 Times in 169 Posts
I can add some personal experience to fuel this debate, at least as far as the VW diesel is concerned. I installed this tune Dynamic EGR Control for TDIs - TDIClub Forums from Malone tuning about two years ago. I also put in a higher temperature Stant thermostat and my highway mpg has gone up about 10%. Click on my fuel log.

Everything I read says that diesels like to be fully warmed up and be supplied with lots of clean, cold air. EGR is hot and dirty and has less oxygen. EGR hurts fuel economy in a diesel in my experience.
__________________
60 mpg hwy highest, 50+mpg lifetime
TDi=fast frugal fun
https://ecomodder.com/forum/showthre...tml#post621801


Quote:
Originally Posted by freebeard View Post
The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.

Last edited by COcyclist; 01-26-2015 at 11:58 AM.. Reason: Autocorrect changes my words to nonsense
  Reply With Quote