<<When you lug an engine it is bad for rod bearings especially due to the
pistons being slammed with early ignition of the fuel mixture as it is
traveling up to and the explosive force is being transmitted down the rod to
the rod bearing and then bad things start happening.>>

My apologies, I was describing knocking not lugging.  Early morning brain lugging...

Both are bad for the engine.  When people try to advance the timing, to gain power, kncking can occur.

But gbearing wear is NOT just engine speeds but care, but the engine gets.

The WBX lasts longer also due to the full flow filter not just a strainer as on T1 engines.

Robert