Citroen Saxo 1.4 SX Auto MPG Issues

anotherbaldrick

The calculation is a flawed procedure. All petrol pumps sense tank full by back pressure in the pump nozzle and this varies pump to pump . In this case pump nozzle two had the sensing trip set to a higher pressure than pump one, allowing about 3lit more fuel in than pump one. Over such a short distance this has given a totally distorted test result.
Go from cut off full to empty to refill on the same pump and you might then get something near the correct calculation.

Hintza

If I'm doing a long drive or calculating consumption I will spend a bit of time filling to the cap so I basiclly override the back pressure cut off.

mattyprice4004

Absolutely nowhere near enough to do a brim to brim test - minimum half a tank but preferably 2-3 full tanks to get an accurate reading.

I could pull more accurate numbers from my behind with 25 miles as a measuring distance.

Notmyrealname

Hintza wrote: »

If I'm doing a long drive or calculating consumption I will spend a bit of time filling to the cap so I basiclly override the back pressure cut off.

Obviously you're completely oblivious that it will chuck out fuel from the tank vent?