Vacuum Pump Opinion

I’ve used the aspirator valves in the past and they do work, as far as I know. Are the effective at low rpm cruising 1500-2500rpm?

Funny we had a green track manager for a while who was convinced cars were oiling the track, when they were just burning what little oil came through

I believe you can put a catch can between the aspirator valves to filter out excess oil before it goes to the headers. May be something to try first before the vacuum pump.