Yes, and I highly recommend you use synthetic in any air cooled engine. Use SAE 10W30 or SAE 30 weight.
yes
In a Brand new engine it is recommended that you get the rings seated before you start using Synthetic oils. So run your engine for 3,000 miles and then you can switch to a Synthetic.
Yes, and I highly recommend you use synthetic in an air cooled engine.
5w30 synthetic
After the break in period it is not an issue.
conventional. I wouldn't put synethic in it unless it has already had it in the engine. Synthetic is mostly used in high performance or new vehicles. Synthetic won't do anything for an older engine
SAE 10W-30 synthetic oil.
5W20 synthetic.
5W30 synthetic
10w30 synthetic is best
SAE 10w30. I recommend you use synthetic oil in any air cooled engine.
No, as long as it is the proper weight. In fact I highly recommend synthetic oil be used in any air cooled engine.