I use Mystik JT-8 SAE 10W-30 oil in my Chopper diesel. It is rated API Service <br>CH-4, CG-4, CF-4, CF/SH. It has a TBN rating of ten. Make sure whatever oil you use is recommended for diesel engines.<p>----------<br>Larry<br>
Amsoil! Look up dealer in the phone book or call 1-715-392-7101 for info and signup. The big bypass oil filter only cost around $20.00 when you by direct.<br>I have been using Amsoil for the last 7 years with no problem at all. I use their oil, gresse, oil filters, and 2-strok oil. Everything works great! They have the highest boiling point on their oil, which means it will not break down when the engine gets hot.
Use any oil with the ratings that meet those needed from Yanmar.Do not use synthetic oil!,the yanmar diesel is extremely heavy duty and requires conventional oil until the engine is fully broken in,about 200-500hrs.Switching before final fit is acheived will prevent the engine from wearing in fully and does more harm than good.I love synthetics,but the engine will outlast this machine easy on cheap oil,so why waste money on synthetics-especially when it holds a lot.<p>----------<br>John D<br>