I didn't like the smell it had when mixed with VP and it put a nice black layer on the piston real quickly, and coated the exhaust port with black stuff.
The R50 cleaned it all up pretty quickly on that machine. 800 does the same as far as cleaning from my observations.
You and Hedgerow happen to be the reason I got Lucas, and Brads why I got K2. I have over a gallon of each of them to try out, but they have some stiff competition from 800 and R50.
R50 probably just got moved down a half of a notch due to that low spot I was in this past weekend. It could have been the smell of the tree I was cutting mixed in with the R50 and VP, but the tree smelled like diluted piss and when I cut the stumps, I felt like my nose was overwhelmed with the intensity of the smells. Have to give it one more try on a job with more than 1 tree to be sure. No headache or nausea, just kept spitting to rid myself of that smell