I know lots like using the diesel oil but its probably not the best to use.
https://www.motortrend.com/how-to/diesel-oil-in-gasoline-engine/ There are quite a few alternatives. Correct engine oils for automotive applications, with the correct amount of zinc and phosphorous. I myself like Penn Grade 1. Penn Grade 1 is the renamed Bradpenn oil when DA Lubricants purchased the brand. Bradpenn oil is the old Kendal 1 green oil that many of us used years ago. Same refinery, same PA crude oil stock as its base, a synthetic additive package with the correct ZDDP. Its still made in Bradford, Pennsylvania, still green and still clings onto the parts. I like it for a lot of reasons, but one of them is the stuff is still coating my rocker arm assembly after the motor has been sitting all winter. That and I am fairly hard on my motors, no failures of any kind using the Penngrade 1 brake in oil, or the 10W30 I have always used in my 235/261 motors.
Just an alternative view.
