somone mentioned 60 to 1. can i use castrol racing fully synethetic in my ty 80 it says for highly tuned engines a know a tyy 80 is an old motor.but if i run 50 to 1 or 60 to 1 will be ok???? what about valvoline what ratio can i run this 60 to 1 is safe.its supposed for racing i guess.but in a ty i can run it?? normal gasoline 95 octane