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Old 02-01-2016, 12:33 PM
kerley kerley is offline
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Join Date: Sep 2011
Posts: 144
Default 180 vs 190 Thermostat

True or False ?
I have read on other forums that my 1998.5 Ram/Cummins oem thermostat was 180* but runs and gives better fuel mileage with a 190*. The claims are that the 190* is hotter and will intensify the burning of diesel fuel. My truck runs okay but if my fuel mileage will increase by upgrading the thermostat, I am all for it. Comments please.
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Old 02-01-2016, 04:26 PM
MnTom's Avatar
MnTom MnTom is offline
Join Date: Nov 2010
Location: Near Duluth, Mn
Posts: 4,899

Yep. True story. Diesels love heat and the warmer they are the better they burn the fuel. The ECM on the 24 valve engines adjust things like timing for a better burn. Ask Mopar1973man about his results.
1996 RAM "Custom Ground" 100 plate 3/4 forward, 300 injectors, 16.5 timing, Goerends Auto = 365HP, 833TQ Third Gen Rims, Aluminum Headache Rack
Duct Tape can't fix stupid, BUT it can muffle the sound
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