I'm roughly 4,200 miles into the OCI w/ Mos2, so far so good. I have decided that I'm going to give Red Line 5w30 a try on the Corolla's next OCI. I'm interested since this oil has 600+ppm of Moly. I'll run it 7500 miles for the first two OCI's, in order to get a baseline as far as wear, etc.
I'm also getting lower than usual gas mileage lately and I'm trying to rule things out; Mos2 is one of them. Of course I'm not saying that's the cause, just checking. I'm averaging around 30-32 lately, when last summer I was averaging 34-35. There are other factors I can think of; new tires sometimes lowers mpg? Also, the MAF could be dirty.
Anyways, we'll see. I still think the Mos2 is a good product.