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  #1  
Old 02-11-2012, 07:38 PM
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Default New thermostat=better MPG?

Hey everyone, I had to replace my thermostat (pain in the ass) it was only a year old (don't purchase cdn tire failsafes POS).
Went and bought a good one from Lordco (190 degree) and already the truck runs better. The last thermo ran really cool, so either they sold me a 180 by accident or it was faulty when I installed it. The on board read that I was getting around 10.9mpg and the week before I changed the thermo I was only getting 10.4 (and no heat at all). Now the truck runs a little warmer (on the 60 mark instead of the 55) and the on board reads 14.5mpg? I'm gonna give it a few more days and see where it levels out. Has anyone else had a similar experience with changing thier thermo's?
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Old 02-11-2012, 08:04 PM
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Shouldn't really make a difference!
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Old 02-12-2012, 08:56 PM
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Default

unless it's stuck open...same thing happenned to my brother on his bmw..complained about gas mileage and heat not workin well...told him to swap out tstats and he got a ton more miles out of a tank now...
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Old 02-12-2012, 09:15 PM
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Makes alot of sense . A cooler running engine will use more fuel . Thats one reason when we install a aftermarket programmer they recommend installing a cooler thermostat . It makes the fuel mixture richer . More fuel , more power . These engines are designed to run hot which makes them more fuel efficient .
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