K&N Apollo Cold Air Intake installed...

[89Vette]

The percentage volatility in such a small measurement renders this observation completely and utterly futile.

I agree. A one gallon observation is not significant or reliable.

It takes at least a whole tank and really two is better.

Don't forget to reset the ECM (disconnect the battery) and drive a few miles before you start the process!!!!!!!!!!!!!!!!!!!!!!!!!

[twalker920]

While you're doing scientific research with this method, can you give us a speedo accuracy check from one revolution of your wheels?

Personally, I was thinking of installing an instantaneous mileage readout just under the fuel gauge on the dash.

I figure a sticker that says "CRAP" ought to be sufficient.