800 will make a mess in OPE unless you run the engine really really hard. The test results are interesting! there's a lot going on that non of us fully understand, especially at these ratios. For what ever reason at that ratio 800 seemed to polymerize and stick to the hot surfaces, I've seen this in equipment ran long and hard. I known at normal ratios unless you run the engine really hard oil will be coming out the exhaust with 800. Could be some of these ester oils act similar to castor based oils? maybe the higher than normal "for 2T oil" zinc content? I too find in most equipment 800 seemed to make them sluggish, and the smell gets to you, still have a gallon of the stuff sitting on the shelf.