Motor oil info

[RichSchmidt]

You can get the zinc back by using GM Engine Oil Suppliment,it is available from any GM dealer's parts department.I build many bigblock Chevy race motors with flat tappet cams and I have been preaching this practice for a while.I am still from the old school,so I have no problems running 20/50 weight race oil in my race engines so I just buy Valvoline race oil,but if I were running the tighter clearances that some builders use,or was inclined to try synthetic oil,then I would use the suppliment at every change with a lighter weigh oil.I run a flat tappet in my own 440 inch engine with 140# on the seat and 450# open spring pressures and never broke the cam in with just the outers,I just put the springs in as they were inteneded an broke the cam for about 15 minutes as most people would normally do.It has over 550run and a few hundred street miles on the engine and I think the pistons rings are going to die before the cam does.A soft ramp cam like a stock L78 or LS6 cam should have no problems with this method.