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Old 06-18-2013, 10:45 AM   #9 (permalink)
t vago
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Originally Posted by moorecomp View Post
I don't have one in the RAV, only the ZX2. You say the min and max could vary by up to 7%, but what percent of your driving is actually at the ends of that range? The majority of my driving (85-90%) is highway at 55 mph. So the actual influence on the indicated mpg is minimal.
It is an inaccuracy in measurement. For fuel economy purposes, I'm ditching the Ultragauge I have now, in favor of the MPGuino, because of a 6% inaccuracy in fuel economy measurement that cropped up because I performed one ecomod.

Say that I have the MPGuino installed, as is, in the Karen-mobile. I have it tuned for highway driving. There is no compensation for the constant pressure returnless fuel system. Now, if I turn around and do a bunch of city driving, then the MPGuino will now indicate less fuel was consumed, than would actually be the case. This would be because the vehicle would be under less loading than on the highway. This would not be reliable.

I might as well have just relied on the Ultragauge I have now.
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