On all vehicles i own, ive noticed when ecus encounter coolant temp above spec'd temperature, they will rev the idle higher. I guess its to spin the cooling system faster, especially the rwd's with mechanical fans. the car thinks it's dying. To guys over 30...remember older cars with bad fans/radiators? We used to bring our idle up to 1500rpm in the drive-thru to not overheat.
the company evans cooling sells no-water based coolant. its pretty convincing to go for it. However im cheap and have just bought the premixed 50.50 stuff,topping off with distilled as necessary.
My machinist showed me the cylinder liners from a diesel that had had cavitation problems perhaps caused by the wrong use of coolent. The pitting caused wall failure and the overhaul.
There are directions on the anti-freeze bottle for a reason.
I use and talk about, but don't sell Amsoil.
Who is shatto?
06 4.7 Tundra replaced a 98 Dakota 3.9.
623,000 miles on original engine and transmission, using Amsoil by-pass filters and lubrication.
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A thermostat DOES NOT control the temperature. It controls the MINIMUM temperature. The fan is supposed to control the MAXIMUM temperature, but it can only do so up to a point.
Don't raise your radiator cap pressure until after you've vhecked/replaced all your coolant and heater hoses.
Raising your coolant temp will not improve your fuel economy. All it's going to do is make your radiator fan come on all the time, cook your oil, raise your NOx emissions, and possibly blow your headgasket. Warm the fuel if you want it to vaporize better, but don't warm the air. That just makes it more difficult for the engine to fill the cylinders.
My coolant temp was unfortunately hovering around 220-225 degrees F until I recently made some fixes and brought it down to 200. Now my radiator fan isn't coming on all the time. So far there hasn't been any significant change to FE.