I've been riding my RXS100 for about 2 weeks now and when I bought it I was told it would get through a tank of two stroke oil for every 2 tanks of petrol. I've used about one maybe one and a half tanks of petrol since then and the oil level in the tank doesn't seem to be decreasing. Also when I kick the crank it often takes a couple of go's and starts idling at much lower revs than it did a few days ago, and I feel like the exhaust smells different but I might just be being paranoid about that. I'm worried that there may be a blockage in the oil tube and the oil isn't getting in to the engine. would it be normal for a two stroke to run for so long like this without oil? and was the guy I bought it off wrong about its oil consumption can it vary depending on the condition of the engine etc.? help would be greatly appreciated, thanks George.