I knew I shouldn't have opened this forum post... I knew it! Now, I'm not so confused as to what people are using... or recommend. BUT like some of you have been saying... 1- How do you know that the motor and internals ARE NOT truly wearing like you mention, unless you continually take the motor apart and inspect (Besides the aided oil test that tells you about 'stuff' in the oil, but not particularly which stuff or what component). 2- How is it that everyone swears by an oil... but doesn't really have any specific info on that oil? I mean I'm in the same... I use one specific oil (name and address withheld) but don't swear by it. Why do I use one specific?! Intended use, name brand, conveniently packaged in gallons, price... etc. Nothing mathematical or researched that's for sure. 3- There never has been a true test of motor oil...(easy... U know what I mean, flames are not necessary) and if there was, like quadsan says "who'd trust it?" There are too many factors to consider. Just way to many. SOooo... "which oil is better" has now become a huge and loaded question in my book... and I've changed this question to a statement, "Synthetic oil seems the best for the motor in our motorcycle and ATVs... but making sure it's ingredients are as mentioned and not counteractive to wet clutches...etc." How's that?!?! Man... I'm soo confused! So where do I buy the Rotella (gas stations?) and what should I expect to pay?! I'm all for it and am going to start using it... as soon as my last gallon is consumed. BTW, Does that mean that I can also use it safely for my personal vehicles too?!?! The Rotella T Synthetic I mean.