John: Marvel Mystery
Oil is the aviator's best friend, at least those than live with engines that have those cylindrical sluminum things with rings on them moving up and down.
Larry can confirm that, especially when it's storage time or loosening sticky valves. Add a pint to the
oil, fire up the engine to circulate the stuff and shut it down. Does a great job for protecting against corrosion to prevent valves from hanging up in the guides. Z-max--AvBlend--does the same thing. Even more. It doesn't burn off like Marvel Mystery
Oil. Even so, if there's a valve-sticking problem, pour in a can of Marvel Mystery Oil. But to prevent valve sticking plus coat the crank journals and cylinder walls, cry once and use Z-max or, in case of an airplane, Avblend.
Remember Mr X, aka Ralph P. He would soak Merlin (Packard) cranks in heated Avblend before assembling engines. Expensive, but consider how much that V12 cost!
Yes, Marvel Mystery oil is good in the gas, too. It truly is a marvel. But it's not in the same league with Avblend. Compare prices.
