I have a 2006 GMC Sierra 5.3L with the ole cold-engine tick (lifters/piston slap). I read over at GM-Trucks.Com forum that the zinc in the GM engine oil supplement helps quiet the cold engine ticking.
Is this true? If so, is the GM EOS the best zinc supplement out there to help quiet ticking engines?
I could live with the tic for the rest of the trucks life, but it's a little disconcerting to hear it when you start the engine.
Ed
Is this true? If so, is the GM EOS the best zinc supplement out there to help quiet ticking engines?
I could live with the tic for the rest of the trucks life, but it's a little disconcerting to hear it when you start the engine.
Ed