two questions....whats a good synthetic oil(and how many ounces per gallon)and whats the difference with the new and old ignition,im using the old ignition with a 6 volt 2100 nmh battery

MVVS prescribes fully synthetic (not synthetic based) two stroke premix racing oil. There are many oils in the market that can be mixed at the required 2.5% ratio like: Mobil1-2T, Motul 800, Putoline Rs959, Amsoil Dominator (not Saber), Redline racing, Castrol XR77 and many-many others. Just as important as the oil is cooling. Not even the best oil will save your engine if you allow it to run too hot.

The new and old ignitions are totally different makes and designs, and cannot be compared. Read the info already provided to a high degree in RCU.