A while back I posted regarding driving with o/d on or off (when under 60-70kph). That was before I had the 3"exhaust installed. I had found the car drove slightly better and used slightly less fuel (not really noticeable though), eventually the mrs turnrd od back on one day and I never bothered to turn it off again. A couple of weeks ago I drove around with od off (now the exhaust is done) and found the car drove heaps better, particularly going up hill, but driving in general. The other thing I've noticed has been a noticeable drop in fuel usage. I am currently halfway through a tank where I will get exact fgures, but it seems around town it is going at least 2 or 3 lph better. Has anyone else noticed this? I had heard the exhaust would help with fuel economy, and it had, but lately I am really noticing it. For the unmechanical minded like myself, what could the reason be for this, mechanically speaking? I will post up exact results once I have them.
RALPHMCPHERSON
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