RalphVa
Super Member
- Joined
- Dec 19, 2003
- Messages
- 7,885
- Location
- Charlottesville, VA, USA
- Tractor
- JD 2025R, previously Gravely 5650 & JD 4010 & JD 1025R
I use 0W40 in the winter and 15W50 in summer in all my air cooled engines.
On any engine with valve gear and parked outside or in unheated unattached building, I'd use a 0Wxx in the winter. In research tests of starting engines at -40 in the winter, the valve gear would start smoking from lack of lubrication unless 0Wxx oil was in the crankcase. Generally, this is only available in synthetic. Mobil1 makes a 0W40 that I use in the winter.
Ralph
On any engine with valve gear and parked outside or in unheated unattached building, I'd use a 0Wxx in the winter. In research tests of starting engines at -40 in the winter, the valve gear would start smoking from lack of lubrication unless 0Wxx oil was in the crankcase. Generally, this is only available in synthetic. Mobil1 makes a 0W40 that I use in the winter.
Ralph
