YS 91 Fuel question
I've used quite a lot of this MT fuels in the past and have just recently used it again for exactly the same reasons you've had...no cp!.
I've found a fuel called quick speed that contain no castor and a nitro level I want. The only thing you need to remember is that it contains only 13% EDL oil!!!! This must be brought up to sratch by adding extra EDL!
If you go to the MT web site and check it out, you'll find lots of info plus telephone numbers.
The Guys are very cooprative and will tell you exactly the amounts of oil need to bring their fuels up to any personal spec. They just tap the ol' computer and hand over the data! Could be worse!
By the way, they make a special fuel for YS engines.