Originally Posted By: Leo99
Originally Posted By: MolaKule
Incorrect Oil Psychology (IOP) 101: Just a little more is better than Full.
Just like sizing oil filters. A little bigger is better than the regular one.
Just like viscosity. A little thicker is better than the recommended viscosity.
Just like jack and jack stand ratings. A little heavier is better than the what's needed.
Not a good analogy IMO.
Over-filling can possibly damage an engine. "DO NOT OVERFILL" is stamped, printed, molded on many things as a warning label.
Viscosity ranges are posted in various owners manuals. Also, the same engines that are offered in the US that are over in Europe and Australia have a higher viscosity rating. The Jeep 4.0 in England for example calls for a 15w40 or 5w40 depending on temperature.
Over-sized filters won't hurt a thing unless you're like me and want to use a spec'd filter for warranty purposes. If one is cleaning a sludged engine, an over-sized filter would arguably have more capacity and be a better buy since it's the same price. The PH16 for my Jeep for example vs. the PH8A filter.
Same with jacks and jack stands. Nothing wrong with additional, more than necessary strength for peace of mind.
None of these examples are equal to overfilling an engine.