How many MPB (miles per bar)? - Toyota Yaris Forums

ellenbetty · 07-15-2009, 04:49 PM

I never paid attention to how many miles per bar. Some of you must have a lot of free time on your hands.

I was taught that the gas gage averages out the bounces from the fuel tank floot to come up with what to display. Since the gas float bobs up and down with every bump and twist in the road it is impossible to build a 100% accurate fuel gage. The idea that the Yaris gas tank may not be square is something interesting to think about.

The first reason I learned not to top off you tank is gasoline expands as it's gets warm, and you can lose gasoline. I had that happen after parking my Gremlin on a hill. The second reason not to top off is that most gas pumps now have a vapor capture system. The vapor capture system will suck the extra gas out. So you are just wasting money if you top off.

Back when I had a 86 Horizon it's vapor recovery system failed around 50,000 miles. Over filling the tank? Maybe. But the problem was covered by warrenty and a new after market vapor system was installed by the dealer free of charge.

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07-15-2009, 04:49 PM	#39
ellenbetty ellenbetty View User's Garage Drives: 2 2007 Yaris 3 door liftback Join Date: Nov 2008 Location: Stow Ohio Posts: 182	I never paid attention to how many miles per bar. Some of you must have a lot of free time on your hands. I was taught that the gas gage averages out the bounces from the fuel tank floot to come up with what to display. Since the gas float bobs up and down with every bump and twist in the road it is impossible to build a 100% accurate fuel gage. The idea that the Yaris gas tank may not be square is something interesting to think about. The first reason I learned not to top off you tank is gasoline expands as it's gets warm, and you can lose gasoline. I had that happen after parking my Gremlin on a hill. The second reason not to top off is that most gas pumps now have a vapor capture system. The vapor capture system will suck the extra gas out. So you are just wasting money if you top off. Back when I had a 86 Horizon it's vapor recovery system failed around 50,000 miles. Over filling the tank? Maybe. But the problem was covered by warrenty and a new after market vapor system was installed by the dealer free of charge.