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Discussion Starter · #1 ·
in figuring mpg i go by gallons used and miles driven on the odometer.
but my speedo is off by 4 mph. at 60mph the local radar trap says im doing 64. other radar traps show the same 7% or so difference in speed no matter what my indicated speed is.
if the speedo is off, isnt the odo off by the same 7%? if so am i traveling 7% farther on the amount of fuel i use?
if this is accurate my mpg figures are 7% too low! im gettin about 19+ mpg combined, empty, 40% city, 60% hiway miles. and a 7% increase would put me over 20 mpg!!!:hyper:
 
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