Oil Causing Increased Engine Fan?

[Wango]

Hello all, my 2017 3500 RAM w/Aisin started running high exhaust fan RPMs since this spring, the fan will run up down even when temps were still colder,

I changed to Rotella T6 5W-40 from 15w/40 this spring, but I wouldn't think that could cause the fan to run more unless it's driven off the oil supply.

Wondering anybody has thoughts?

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[AK Bob]

Hello all, my 2017 3500 RAM w/Aisin started running high exhaust fan RPMs since this spring, the fan will run up down even when temps were still colder,

I changed to Rotella T6 5W-40 from 15w/40 this spring, but I wouldn't think that could cause the fan to run more unless it's driven off the oil supply.

Wondering anybody has thoughts?

See attached PDF for testing the electronically controlled viscous drive cooling fan.

It contains its own silicone fluid, so your change in engine oil weight will not affect the fan speed.

Cooling Fan Testing.pdf


2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit and 50 Gallon auxiliary fuel tank.

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