Better MPG
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10th Gear
Joined: Jun 2002
Posts: 12
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Better MPG
I noticed my gas milage deteriorating over the past several months and I have been racking my brain trying to figure out why. I thought, well it is summertime...its 100 degrees down here... we are using the a/c more...the gas companies have figured out a way to for the fuel to burn faster in our cars...I'll try a different brand of gas...I need to clean my air filter...I need to reset the computer settings...I'd check the tire pressure but I just had the tires rotated at a Honda dealer 1500 miles ago; surely they would have set it right...right?
My tires were at 29 to 33 p.s.i. I looked on the tires and saw the max at 41 p.s.i. I set them to 39 and noticed an immediate improvement. I finished my last tank at 27 m.p.g. even after a few stints over 6000 rpms.
I still have never been able to get more than 15.5 gallons in my tank and I have a theory about the phantom 1.6 gallons that supposedly still exist in my tank. Maybe the tank extends up from the fill cylinder a couple of inches making the volume of the tank 17.1 gallons, but we never get to use it because the pressure pushes gas up the cylinder and stops the pump before it can reach its full potential. Just a theory. I can't figure it out. I ran out of gas once and the car only took 15.5 gallons.
Anyway, I figured out my mpg problem and I now carry around my own pressure gauge.
My tires were at 29 to 33 p.s.i. I looked on the tires and saw the max at 41 p.s.i. I set them to 39 and noticed an immediate improvement. I finished my last tank at 27 m.p.g. even after a few stints over 6000 rpms.
I still have never been able to get more than 15.5 gallons in my tank and I have a theory about the phantom 1.6 gallons that supposedly still exist in my tank. Maybe the tank extends up from the fill cylinder a couple of inches making the volume of the tank 17.1 gallons, but we never get to use it because the pressure pushes gas up the cylinder and stops the pump before it can reach its full potential. Just a theory. I can't figure it out. I ran out of gas once and the car only took 15.5 gallons.
Anyway, I figured out my mpg problem and I now carry around my own pressure gauge.
Three Wheelin'
Joined: Aug 2002
Posts: 1,481
Likes: 0
From: NJ
first of all, i dont know why u were setting ure tire pressures so high, 39 isnt good because itll cause uneven tread wear on ur tires and also, itll make ur car seem like its floating and may decrease ur handling... the last thing u need is a TL lifted any higher... if u set ur PSIs at 39 before driving, i cant imagine how high they were with the heat and the driving combined.
as far as ur gasmileage is concerned, i usually get near empty at 13.5gallons myself but im gettin around 25mpg... itll drop more once i start pushing it harder but my engine isnt broken in yet... sure its over the breakin period but itll really kick in better when its around 3kmiles.
Is the 15.5 when the fuel light shows up or what? or is it when ure right on the edge of running out of gas?
as far as ur gasmileage is concerned, i usually get near empty at 13.5gallons myself but im gettin around 25mpg... itll drop more once i start pushing it harder but my engine isnt broken in yet... sure its over the breakin period but itll really kick in better when its around 3kmiles.
Is the 15.5 when the fuel light shows up or what? or is it when ure right on the edge of running out of gas?
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