[nightdriver]

"When you start the engine and the pressure builds up from the mech pump, the aux pump shuts off."

Of course, and when the pressure falls below a certain value, it would come back on. That way, hot oil, hot day, idling engine in traffic would have the advantage of keeping bearings flooded and lifters pumped up.

It would definitely increase engine longevity.

[StarfireIV]

Thank you. I had not even considered that. Did you see the link to the Rotec site? The pump is listed under accessories.