I also have tested te oil in the 4 strokes I ran after 3-5 rides as it was coming back with 50-60% life left
How much time do you put on the oil in "3-5 rides"? Also is this MX or trails or a mixture of the 2?
All mx I count 1 ride as a prac day or a race day.
Cool... just curious how much track time you typically get in a practice day. I wasn't questioning your test results or anything. Just trying to get a little more info for comparison purposes.
A practice day for me is typically 1.5-2.5 hours of track time depending on whether its a weekday (6p-10p) or a weekend where it is less formal and I can go out at will and ride till I'm beat (sometimes up to 4-5hrs of on track time). Most of my oil tests were done at 5 hrs on my meter which is when I typically change my oil because I am anal retentive and only have one bike so I don't want to take any chances but I sent tests in that were left in for 15 hrs (just for testing purposes) and at 15 hrs I was at about 50% every time with Rotella. Never went past 5 hours with any other brands.
My tests at 5 hours showed between 10-12% with Rotella, 19% with Yamalube, 22% with Lucas oil synthetic, 22% with Motorex power synthetic, 28% with Lucas Semi synthetic (also experienced clutch slip), the worst was the Suzuki oil... it came back with 37% break down at 5 hrs.
All tests were done with my RMZ450 so I think it is safe to say that all of them will hold up to the abuse of your typical track rider, but I prefer the one that stands up the best and is also the cheapest. The Rotella also had the least amount of contaminants from the tranny/clutch.
Also says something that Rekluse recommends it that you should run it with their clutches.
FWIW: all tests were done by Blackstone Labs... pure MX use.