[QUOTE]Originally posted by Woodsy
also has any one tried the Shell racing M

Haven't tried it, but have used various brand, including Shell, mineral and synthetics in two stroke racing bikes over the years.

Observably different brand minerals or synthetics do exhibit different burn properties, but as a generalisation, when it comes to the synthetics in particular, they're much of a muchness insofar as empirical results reveal.

Argument and marketing abounds about which one is superior, but IME there really isn't a bad one in the market, individual engine design flow and combustion idiosyncrasies notwithstanding. But that's another story of exhaust flow design & Castrol TTS, otherwise an excellent lubricant.

Shell have been producing mineral and synthetic 2 stroke motorcycle oils for racing for some time now, so they should have their act together over this. In choosing my oil, if it meets spec., buy price is THE factor. At the moment, I use Mobil Racing 2T because neither their motorcycle product profile or advertising budget is as high as Shell's, nor are they as bike boutique as Motul which is reflected in the price.

Buy price on the Shell Racing M sounds mighty appealing to me as does the easy to obtain factor. Thanks for the heads up. I'll have a bo peep at their data and spec sheets if they're online and ask around to see if anyone in the club has trialed the stuff.