been using royal purple 10- 30 on all my roller builds never a problem. My 340 FT Iḿ using valvoline 10-30 w racing oill never had a noise unless i forgetto shift and hit 7500+ then get some tick for a minute but it goes . Use the right oil and don´t use cork gaskets if you use syn oil might help . been using synthetic sice 1981 and all my car get to 400,000 miles before i get rid of them have yet to have any engine related failures , with my cars or the trucks and mobile cranes I maintained for 30 years before i retired
