ContraHusky
Husqvarna
A Class
Read this and become informed...it will help protect you from sketchy internet advice:
http://www.bobistheoilguy.com/motor-oil-101/
Both types of oil lubricate just fine. Synth lubricates a cold engine better...that's the main benefit. It also has the potential to last a little longer, but our bikes spec a short oil change interval anyway.
If you use synthetic, it MUST have the JASO-MA certification for wet clutch use. Do NOT use synth oils that have the "Energy Conserving" logo on the API circle. Your clutch will slip.
BTW -- I switched to Rotella 5W-40 after I read that primer and talked with my uncle, who is a retired engine design engineer who specialized in lubrication. If some engine rebuild guys measured something different...then they weren't controlling the test parameters properly. While the Rotella is marketed as a heavy-truck diesel oil, it has the JASO-MA certification, which means that Shell took the trouble to get it certified and they know something about this stuff. My uncle did research and wrote papers about engine design and oil for 40 years (mostly at Cummins). He said...don't screw around. Just buy the synthetic.
http://www.bobistheoilguy.com/motor-oil-101/
Both types of oil lubricate just fine. Synth lubricates a cold engine better...that's the main benefit. It also has the potential to last a little longer, but our bikes spec a short oil change interval anyway.
If you use synthetic, it MUST have the JASO-MA certification for wet clutch use. Do NOT use synth oils that have the "Energy Conserving" logo on the API circle. Your clutch will slip.
BTW -- I switched to Rotella 5W-40 after I read that primer and talked with my uncle, who is a retired engine design engineer who specialized in lubrication. If some engine rebuild guys measured something different...then they weren't controlling the test parameters properly. While the Rotella is marketed as a heavy-truck diesel oil, it has the JASO-MA certification, which means that Shell took the trouble to get it certified and they know something about this stuff. My uncle did research and wrote papers about engine design and oil for 40 years (mostly at Cummins). He said...don't screw around. Just buy the synthetic.