"Mileage" vs. "MPG" vs. "Mile range" vs. "Miles per tank"

Re: "Mileage" vs. "MPG" vs. "Mile range" vs. "Miles per tank"

well i think that if you fill up your car with 5 gallon drive until empty.. and the fill it up 15 gallons drive the same road until empty.. you'd get better mpg on the gallon tank because less weight

Re: "Mileage" vs. "MPG" vs. "Mile range" vs. "Miles per tank"

Originally posted by NB TDI:
well i think that if you fill up your car with 5 gallon drive until empty.. and the fill it up 15 gallons drive the same road until empty.. you'd get better mpg on the gallon tank because less weight

Click to expand...

<font size="2" face="Verdana, Helvetica, sans-serif">What "gallon tank"??? Keep thinking...

Re: "Mileage" vs. "MPG" vs. "Mile range" vs. "Miles per tank"

Originally posted by jjvincent:
Jack up the RR of the car while you're filling it. If there are any air pockets in the tank, they might come out.
We used to watch the Camaro's do this when they would come in for a fuel stop. With a 944 we could only get in an extra 0.2 gallon.

Click to expand...

<font size="2" face="Verdana, Helvetica, sans-serif">I used to do this on previous diesels (Chevette, Nissan Sentra, Ford F250) when I really wanted to get it full. In the Ford I used to carry around a few extra 2x4s to elevate the filling side/corner. Hell, in that case I could get in an extra gallon or two.

Re: "Mileage" vs. "MPG" vs. "Mile range" vs. "Miles per tank"

Originally posted by jjvincent:
One other way to check fuel mileage is to equip your car with a PI system. Put on 2 fuel counters and a wheel speed sensor. Now you have realtime data.

Click to expand...

<font size="2" face="Verdana, Helvetica, sans-serif">I like this - but rather than use a wheel speed sensor and introduce MPH variation due to air pressure and tire diameter and all that jazz . . .

Use a ground speed sensor, one fuel sensor on each of the fuel lines - take the difference of the two sensors and you've got true consumption.

Problem is the sensitivity of those sensors will have to be soo great esp for those slow pokes puttin around at 50 mph in 5th gear . . . that and how do you take a real true groundspeed number? (GPS?)