higher temp thermostat = better milage? - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 01-14-2012, 08:52 AM Thread Starter
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higher temp thermostat = better milage?

Hay guys,
Had a guy tell me that if I put a higher temp thermostat in my 2000 7.3 it would get better fuel milage, is this true or has anyone hear of doing this?
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post #2 of 4 Old 01-14-2012, 09:43 AM
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I heard the same thing but I can't verify it. I installed mine when we were making the change over to winter fuel which always makes my mileage worse. I probably won't know for sure until next summer.

The best part of the warmer t-stat is the cabin heat rocks! It still takes a while to get up to temp but once she's up you could toast marshmellows from the vents. My wife even commented that she likes how warm it is now.

There is a write up on DieselSite about why you should run one and I found a page a while ago where a guy did a study on the mileage. Can't find it now though.

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Great White - 2003 7.3l F-250 4x4 CCSB -102,000 miles and tickin
DIY intake - 4" Straight pipe - HPX - CAT ELC - 203 t stat - billet t stat housing - coolant filter - dual alt radiator hose - 12V Air compressor - 5 gallon air tank - Air line quick connects - AIR HORNS!

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post #3 of 4 Old 01-14-2012, 10:35 AM
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Quote:
Originally Posted by mxfever090 View Post
I heard the same thing but I can't verify it. I installed mine when we were making the change over to winter fuel which always makes my mileage worse. I probably won't know for sure until next summer.

The best part of the warmer t-stat is the cabin heat rocks! It still takes a while to get up to temp but once she's up you could toast marshmellows from the vents. My wife even commented that she likes how warm it is now.

There is a write up on DieselSite about why you should run one and I found a page a while ago where a guy did a study on the mileage. Can't find it now though.


Pretty much the same here, I did mine in November, so hard to tell for sure, being that were on winter fuel and I tend to plow at least once per tank.

That said... I recorded the highest mileage since I've had the truck.... 18.5mpg... after installing the 203* TS.

I say do it.
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post #4 of 4 Old 01-14-2012, 12:01 PM
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I looked into it and a lot of reading on the subject, but about the only advantage I saw from it was from the guys up north with the harsher winters. If your like me, the coldest running temp I've seen is 26* and it wont be really noticeable. Just my 2 cents..

Cody Ryan
03 f250 ccsb fx4 7.3
4" RC lift
35x12.50 federals on 20x12 rockstars
6637 intake, straight pipe
full RR w/ fuel bowl delete.
rebuild coming soon


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