What HDEO choices do I have in Midwest US for a SAE Viscosity 10W-40 that is an API CI/CJ4 specification. Trying to meet the Manual Requirements for a 10W-40 that I typically do not see available. It is a small IDI diesel tractor with 3 cylinder 1.1 liter.
The Owner Manual is as follows:
above 77 F (25C) SAE Viscosity 30w / 10W-30 / 10W-40
32 F to 77 F (0C to 25C) SAE Viscosity 20w / 10W-30 / 10W-40
below 32 F (0C) SAE Viscosity 10w / 10W-30 / 10W-40
I use the tractor spring/summer/fall with outside temperature range from 40F to 100F. I am not real comfortable using 10W-30 as is allowed in the manual and would like to use the 10W-40 if I can find it. Would like to use 15W-40 but that is not shown as a recommended oil. I am surprised that they do not allow a 15W-40 for temperatures above 32F. Thus that is why I am looking for a easy to locate 10W-40 CI/CJ4 oil.
Thanks Slick