Originally Posted By: Injured_Again
Clevy, what I seem to notice about my fuel economy gains are that they are most noticeable in steady state driving, like continuous freeway. In stop and go traffic, I think any frictional reduction gets lost in the noise of all that acceleration and deceleration and the vagaries of traffic flow. Whereas on the freeway, it really does become a matter of how efficiently the engine is running.
Is that your experience also?
City mileage really hasn't changed. The stop and go and wait and go and stop really isn't even trackable to be honest. Depending on road construction and whatnot there are just too many variables.
I drive mostly on the freeway to get to whatever neighbourhood,and I'm never in rush hour traffic. I'll work the extra hour for traffic to dissipate or go for a drink til the traffic is mostly gone.
I always drive this way though,and my first 3000 miles were tracked driving the same routes at the same times as now.
To answer I find the most noticeable improvements are on the highway,and my improving highway MPG's are very likely is what is bringing up the total average.
City MPG's are likely the same as before but my highway MPG's have improved so much that its bringing up the total average.
Is that making sense?
My idle has gone up to 720RPM whereas even yesterday it went from 600-630RPM. It has increased slightly. I'll see if anything changes tonight.
I can say my idle increased for a short time on all my prior vehicles but being obd-2 the idle eventually returned to stock within a few drive cycles.