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Discussion Starter · #1 ·
There are 2 options for my thermostat 180 degree and 190.Which one do you use and does anyone know why there are 2different temps for the thermostat.
 

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I have a 190 in mine and my experience with Class 8 rigs tells me they will have a bit more power and get a little bit better fuel mileage running at 190 or a little more. I don't recall what the computer showed on the trucks that had them but it seems like they ran about 200*. Been a few years since I have been in one with a 'puter though. If it is important enough to you my bro's rig has one in it but I am not sure it is still working since it has over 750,000 miles and 10 years now. :lol3::CRY::thumbsup
 

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I have tried both in my 01, and had better luck with the 190°
 

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Discussion Starter · #4 · (Edited)
thermostat

Went with the 180 temp thermostat and couldent be happier.Im pulling in the Hillcountry in Central TX and with the heat between 95 and 100 this has really helped.Im pulling a 40 ft inclosed high celling cargo trailer completly loaded down head to toe .Found out about the 180 degree thermostat in another thread here on the site ,Cummins Forum for the win:peelout


 

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Yeap I agree you get better MPG with a hotter thermostat compared to 180*F. Because the ECM is constantly being told that the engine is a bit cool and add more fuel. Yes... The Gasser Dodge's do this for a slight power increase but doesn't help with MPG though...:w:
 
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