When it comes to 2 stroke oils, believe it or not, synthetics are not superior. The Mobil oil you asked about has a flash point of 190 deg F which is VERY low. Klotz benol blend oils (80% synthetic w/ 20% degummed castor oil) have a flash point of 450 to 500 deg F.
I am now using Klotz product exclusively and let me tell you, the fact it didn't burn up at high temps saved my engine. I was doing some mountain climbing today and my engine got so hot, the head changed color but it kept on chugging and still runs like new. If I had been running any other kind of oil, I'd be doing a rebuild instead of typing this email.
99.9999% of oil or fuel additives are SNAKE OIL.
http://www.ftc.gov/opa/2001/02/zmax1.shtm is the FTC fine/lawsuit against Zmax for false advertising. Any benefit anyone feels from this additive is probably due to placebo effect or the fact that engine is continually breaking in and getting more powerful with each successful tank of fuel until peak compression is acheived at break in.
Also, hate to ruin the mystery but Marvel Mystery Oil called MMO for those in the "know" is nothing more than repackaged auto transmission fluid. I used it in older diesels to clean/purchase the injectors and occasional use it in rotary engines to unstick stuck apex seals.