Thermostat 160 or 195?

Discussion in 'Chevy Truck Forum' started by billk, Jul 8, 2008.

  1. billk

    billk Full Member

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    I am about to leave on an extended trip (1500 miles) and noticed today that my truck has a 160 degree t'stat installed
    Would it not benefit my MPG to change to a 195 degree t'stat?
    The truck is a 88 5.7L C2500 with 148,000 miles.
    I have always believed a hotter coolant temperature improved efficiency?
    T'stats are cheap maybe it would help the mpg?
    Any thoughts?
    Thanks
    Bill
     
  2. mrjohnwayne

    mrjohnwayne Full Member

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    hmm. from my personal experience with a 160 tstat and a 195 tsat there really wasn't a difference MPG wise. You could always try and see what happens, but I don't think there will be any advantage to it.
     
  3. 03chevy

    03chevy Senior Member

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    you won't get any better mpg. but the cooler the motor the better. and less likely it will over heat.
     
  4. bradrhale

    bradrhale Senior Member

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    use what the manufacturer put in there. they believe that that temp worked the best.
     
  5. DeepDan

    DeepDan Full Member

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    You could go middle of the road and put in a 180 degree thermostat. :D

    BTW, I have an 87 with the 5.7 L TBI and went from 160 to 180, noticed no change in mileage.
    Dan
     
  6. stumpuller454

    stumpuller454 Well-Known Member

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    195 will work best unless your tuned for a cooler stat, hypertech used to sell a 160 "powerstat" and with there tuner it was optimized, from my experience on stock engines 180-195s are key, but with mods an tuning you can go lower and still be effeicient, either way its only a couple of bucks to prove it...
     
  7. 436'd skylark

    436'd skylark Senior Member

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    you'll need a 195 stat in that truck, and you should see a gain in fuel economy. 160 stat will not allow the motor to go into closed loop very fast, and in open loop the computer runs richer.
     
  8. gmctrucks

    gmctrucks Full Member

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    Truck

    X 2 he hit right on the head.
     
  9. smokensteve

    smokensteve Senior Member

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    if you have a winter use the 195 and use the cooler 160 in the summer...if you use a 160 in the winter you may not get very much heat ...
     
  10. Chevy_Finatic79

    Chevy_Finatic79 Senior Member

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    for some reason every motor I have ever put in my 85' Chevy truck runs way too hot with a 195* T'stat something like 220* and up. so I bought all the lower temp T'stats and tried them until my operating temp was @ 195* I didnt get to the 195* OP temp until I ran the 160 T'stat which was wierd be cause every motor I put in was running fine in something else with the 195* T'stat
     

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