thanks the benol is what I have been using for years and have had no probles bearings/exc but I was told it was leaving the inside of engen black/also I canot get it any more is that other stuff any good at all I am wating for rc susplies to come back to find out what he gave me ///or what it is suspost to be used for thanks for the reply we run 10 percent oil but at QLD titles I droped it to 8