any opinions on 2 stroke royal purple,i ran out of yammalube and all i could get my hands on was some royal purple,there was an ex yamaha dealer there at the tournament,he told me no issues what so ever to run it in my 250 hpdi he also said no need to run ringfree with it as it is a synthetic and burns cleaner,this has nothing to do with the cost of oil or the availibility as i still have to order both,but the engine actually runs quite a bit better actually think i picked up couple hundred rpms(maybe not could be cooler temps) but can anyone recommend or not recommend using it,thanks in advance