Synthetic oil is fine in motorcycles, however automotive synthetics aren't. DO NOT USE AUTOMOBILE OIL IN A MOTORCYCLE. Car oils contain anti friction additives that will kill motorcycle clutches and bearings. Some of you posters seem to have found out this the hard way. The auto oil is too thin for motorcycle use,too. They thin down the oil and change clearances and materials so the oil will work in them. The whole point is to get better mileage buy reducing internal drag.
Synthetic motorcycle oil does contain many of the same additives that car oils do, like zinc, molybdenum disulphide and a bunch of others.
If you want to run Mobil 1 Synthetic in your T160, I'd recommend their 20W-50 V-Twin stuff. It's made for air cooled motorcycles. I use it in my Royal Enfield.
If you really want to know a lot about motorcycle oils, Amsoil did a comparison test on a bunch of oils, and showed the contents of each brand and wear comparisons on each. It's a complete detailing of oils and a good thing to have in the memory box. Unfortunately, I can't find my link to it, but I should think a search for Amsoil oil Comparisons or Tests should bring it up.
Last edited by barenekd; 11-13-2012 at 08:00 PM.