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It seems that 75% of fuel pumps tested were inaccurate up here in the great white north. And you can probably guess which way the inaccurcies went. So much for checking your fuel milage, although offcials did not say how much they were out.
It seems that 75% of fuel pumps tested were inaccurate up here in the great white north. And you can probably guess which way the inaccurcies went. So much for checking your fuel milage, although offcials did not say how much they were out.
They are not saying what stations are guilty but at a 7.5 out of 10 fail rate it is not to hard to do the math. I don`t know the laws in the US but up here in Can they are required to check at certain intervals but that is left up to the companies. The goverment is now increasing fines to over 10000$ for repeat offenders. It would be interesting to see the results of a test of pumps in the USA and see if they mirror the results up here.
After many years of installing, rebuilding and repairing liquid measuring meters, I can say with authority that meters wear in the customer's favor --- There is only one way a liquid meter will steal fuel after it is calibrated - tampering.
As far as volume, most petroleum products will expand and contract on temperature changes. Most meters have devices that compensate to 60 deg so when the liquid is below 60 deg, you get less than 1 gallon volume. When it is over 60 deg, you get more than 1 volume gallon. Since most tanks are buried underground the liquid temp is going to be close to 54 deg.
The point is that when you purchase 1 gallon of fuel, you should receive xx btu's no matter what the volume is. Just like if you top your tank off to the top of the filler and then park in the hot sun. The fuel expands and goes all over the ground. You don't have more fuel than you started with, it didn't clone itself in the tank, each molecule is just bigger but holds the same amount of btu's.
back when i was racing two stroke mx i had a clear five gallon jug with measurements on the side. very rarely did one gallon on the pump get me to the one gallon mark on the jug. i used a one gallon milk jug and wieghed it to see if my fuel jug was correct and it was.