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Instead of thinking mpg gain, look for the percent change in gph at idle.
Get it fully warmed up, then let it settle at idle and see how many gph you're burning. Then change the oil, get the new load fully warmed up, and see how many gph you're burning now.
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Originally Posted by sheepdog44
Transmission type Efficiency
Manual neutral engine off.100% @∞MPG <----- Fun Fact.
Manual 1:1 gear ratio .......98%
CVT belt ............................88%
Automatic .........................86%
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