camo wrote:Ive heard we should use mineral oil in the engine due to the ball bearing crank ?
Camo, I use cheap 20w 50 mineral oil in Speedboat & Penrite 15w 60 fully synthetic in Squib. Speedboat is now a fairly high mileage bike, and has been using cheap mineral oil since new. Squib has used the Penrite oil since its first service. Urals have roller bearings on the crankshaft and a low pressure oil pump.
Both work well, and both are used by many Ural owners.
The only oil I'm not prepared to use is 4T motorcycle oil because our bikes have dry clutches, and normal automotive oil is specified in the owners Manual. But many owners use it without any issue.