Quote:
Originally Posted by tlouie
Well I installed the JBD at 1225 miles and now am at 2500 miles....not alot of time on it, but here are my observations:
.....I dunno how accurate the onboard computer is but in the drive from home to work my car was getting 27mpg, and now the onboard computer is telling me an average of 31mpg...this could also be the car breaking in more and losening up
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The OBC is not expected to be accurate with this box installed. It is a documented side-effect of the box fooling the ECU. If you are measuring from tank to tank, and calculating manually, I would be interested in any improved fuel consumption. Unlikely though, as it takes fuel to make power, and if you are noticing more power, you are burning more fuel. If you aren't using any of the increased power, you wouldn't burn more fuel, but then what would be the point of having the tune?
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