WinterDeere
Super Member
- Joined
- Sep 6, 2011
- Messages
- 5,626
- Location
- Philadelphia
- Tractor
- John Deere 3033R, 855 MFWD, 757 ZTrak; IH Cub Cadet 123
I can understand that, but if oils are chosen appropriately for the temperature range, there's debatable benefit in waiting several more hours for a few degrees increase in oil temperature. It's not like your block heater is running your oil pump and pre-lubing the engine.The longer soak times are probably because preheating an engine is about more than just starting it. I've started my engine when it is 15˚F out without any preheating. I cycled the glow plugs twice, cranked it over, and it started up. Just because I can, doesn't make it my preference.
And if anyone is going to argue CTE and tolerances, note that there's a minimal difference between the TE of "operating temperature to 40F", versus "operating temperature to 60F", when the operating temperature around critical moving parts is several hundred degrees, and CTE's run 2 - 4 ppm/°F.
It might make you feel better to wait a few hours, versus a few minutes, but your engine doesn't care about your feelings.