05-18-2012, 02:44 PM
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#1 (permalink)
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Master EcoModder
Join Date: May 2012
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Tire presssure? HUGE difference!
Ive always run my tires about 4 over at 36lbs and average 32-36mpg highway. A couple days ago i bumped them up to 40 and now i am easily getting 38-42. I am blown away by the huge increase. Cant wait to see the average.
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05-18-2012, 02:52 PM
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#2 (permalink)
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EcoModding Apprentice
Join Date: Aug 2011
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Tire pressure certainly helps but we have been seeing warmer temps and lighter winds the last few days in the Mid-West.
I run at max sidewall, but my wife went and had an oil change done, they lowered the pressure and it felt like driving through mud.
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05-18-2012, 03:57 PM
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#3 (permalink)
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Drive less save more
Join Date: Jul 2011
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My car rolls so quickly with 50 psi i often out coast the traffic speed,making pulse n glide a breeze to use. One little pulse = one big glide and sometimes even some braking.
I take full advantage of the slight declines and do a mega glide on them.
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05-18-2012, 04:48 PM
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#4 (permalink)
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Master EcoModder
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When you say "over" do you mean over the car manufacturer recommendation or over the max psi on the sidewall?
Tire pressure definitely makes a big difference in both fuel economy and ride quality!
My 3000 pound Jeep has Load Range E truck tires. If I inflate them to 80PSI the jeep will bounce off of the surface of the pavement on bumps!
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05-18-2012, 05:44 PM
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#5 (permalink)
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Master EcoModder
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The car is recommended at 32 all around. Tires will take 44 cold. The ride is much stiffer but i think i can live with it.
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05-21-2012, 02:52 PM
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#6 (permalink)
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EcoModding Lurker
Join Date: Jun 2011
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I've been running 6-8 pounds over max sidewall on my car and it's certainly helped. It was the first "mod" I did.
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05-21-2012, 04:13 PM
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#7 (permalink)
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Master EcoModder
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Quote:
Originally Posted by Miller88
When you say "over" do you mean over the car manufacturer recommendation or over the max psi on the sidewall?
Tire pressure definitely makes a big difference in both fuel economy and ride quality!
My 3000 pound Jeep has Load Range E truck tires. If I inflate them to 80PSI the jeep will bounce off of the surface of the pavement on bumps!
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Same here, I run the E tires at 45, that's harsh enough.
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I'm not coasting, I'm shifting slowly.
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05-21-2012, 07:34 PM
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#8 (permalink)
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Master EcoModder
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I run 43psi around town and have grow accustom to the ride. (in my opinion it is NOT too hard)
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05-22-2012, 08:09 PM
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#9 (permalink)
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Master EcoModder
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some are OK at max, others not so much. My truck is downright dangerous at 80 PSI. The right combination of bumps on a corner and you may just leave the road 
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05-22-2012, 11:32 PM
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#10 (permalink)
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Master EcoModder
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Filled up today. This tank had some aggressive driving and quite a bit of idling due to road construction. Still pulled almost a full 1mpg increase. Highway cruising seems to average about 3mpg higher. That is going from 36 to 40psi.
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