That is good to know Vivo. Thanks for the heads up.
I have been putting a dab of silicon grease on all my O ring before using.
Did not know modern motor oils had an additive to protect rubber.
Silicon grease is good... they do the same thing... our motor oil has lots of additives like friction modifiers, detergents, anti-foaming agents, anti-corrosion additives, etc.
Another product is the Engine Stop Leak... this oil additive stops leaks by making old rubber seals swell, thus, stopping the leak... this is also good for dabbing o-rings...
