Second tank of gas 25.62 MPG

mayday813 · 06-29-2011, 11:25 PM

I just returned from a trip from Des Moines to Columbus OH and back, a total of 1,331 miles and averaged 27.8 mpg with an average speed of 68 mph for the entire trip. Best mileage was 30.5 mpg and worst segment was 25.3 mpg (very strong head wind.) I typically drive about 5 mph over the limit and speed limits are 65 mph in IL and OH and 70 mph in IA and IN. This average includes some city driving in Columbus and several stretchs of road construction, especially in Indy. I've got about 5K miles on the car.

shadow2k · 06-29-2011, 11:43 PM

Fuel gauges in cars are a linear measuring system, but measuring something that is not linear. So no, they are never accurate.

The fuel gauge is just measuring the height of the fuel in the tank. The top of the tank is much wider and contains more fuel, so it goes down slower. The bottom of the tank is much smaller, so it drains quicker.

06-29-2011, 11:25 PM	#1 (permalink)
mayday813 Base Member Join Date: Dec 2010 Location: Iowa Posts: 143 Drives: 11 370Z spt tour 6mt Rep Power: 16	Respectable mpg in my opinion I just returned from a trip from Des Moines to Columbus OH and back, a total of 1,331 miles and averaged 27.8 mpg with an average speed of 68 mph for the entire trip. Best mileage was 30.5 mpg and worst segment was 25.3 mpg (very strong head wind.) I typically drive about 5 mph over the limit and speed limits are 65 mph in IL and OH and 70 mph in IA and IN. This average includes some city driving in Columbus and several stretchs of road construction, especially in Indy. I've got about 5K miles on the car.

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06-29-2011, 11:43 PM	#2 (permalink)
shadow2k Base Member Join Date: Jul 2009 Location: Overland Park, Kansas Posts: 143 Drives: 09 PG 370z 6MT Rep Power: 18	Fuel gauges in cars are a linear measuring system, but measuring something that is not linear. So no, they are never accurate. The fuel gauge is just measuring the height of the fuel in the tank. The top of the tank is much wider and contains more fuel, so it goes down slower. The bottom of the tank is much smaller, so it drains quicker.