Hey J,anyone use 15/40 diesel oil or 20/50 engine oil ?
This ^^^^^^^^^^Hey J,
I've used ROTELLA 15/40 wt oil in my B engines for decades. IMV, it is called/known as 'diesel' oil, because it contains elements that make it suitable, maybe preferable, for diesel engine use.
I believe that LOTS of model a owners have found that this is a good lubricant for A/B engines, and therefor use it.
do any of these oils have zink? im told you need it and modern oils have little to none. anyone know ?