Quote:
Originally Posted by oldtamiyaphile
Remember, a OBD gauge is never going to be accurate to within 2%. The biggest thing that will throw it out is a change of driving style.
Pulse and DFCO doesn't work, even on cars like my Trafic (tiny diesel- heavy vehicle) where I can't even tell if I'm gliding in gear or neutral.
Pulse and gentle throttle may work. It works for Hybrids and it works for diesels, but I have feeling for a typical petrol car it may not - you're operating at max pumping losses that way - which is contrary to the whole point of P&G.
I don't bother with P&G on the highway - you'll have the same results just sitting in the slow lane.
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I know my ScanGauge does not give me a definitive mpg but it does show me if what I am doing is better than worse than what I was doing before.
I was on the highway yesterday evening and what I am doing is more Pulse and Gentle throttle than using DFCO. I can get 50 seconds at 100+ mpg for 10 seconds at 40 mpg and when conditions allow (like slight down grades) I sometimes can use full DFCO.
And here in Scotland our highways are either one lane in each direction or two lane, where the "slow lane" is travelling at 50 - 55 mph and the "fast lane" at 60 - 65 mph. Unless of course it is a blanket 40 mph with average speed cameras!