Originally Posted By: dustyroads
I'm not the least bit familiar with the engine, but the oil is in great condition.
The viscosity is okay with 1.3% fuel dilution. The TBN of 3.1 is at a decent level, no worries there. While I don't know at what point Polaris would flag nitration or oxidation, if it isn't highlighted then it's okay. Silicon isn't too high, either.
The oil is still serviceable and I wouldn't hesitate to use 100 hours as an oci. If you're not comfortable with it that's fine, but there's nothing wrong with those results.
Edit - I guess I should say the oil is in good condition rather than great. Keep in mind that the sample comes from a very small capacity of two quarts. For almost 100 hours of work it's not bad.
I wouldn't mind running amsoil like I do in my other mower, but it's just so expensive, I'm looking at like $30.00-$40.00 for an oil change on a mower, that it's almost foolish. I suppose I could by the oil and filters in bulk and save on shipping, but I like to buy it when I do the service for maintenance records. I don't know, maybe that's a dumb idea.