This is my 4 year review and oil change of Harbor Fright item number 61176, 66466, 60805
Harbor Fright PITTSBURGH AUTOMOTIVE 3 CFM Two Stage Vacuum Pump
https://www.harborfreight.com/3-cfm-two-stage-vacuum-pump-61176.html
Designed for servicing automotive air conditioning, this two-stage vacuum pump pulls vacuum down to 22.5 microns. Precision machined two-stage pump removes moisture from air conditioning systems to safely add refrigerant. This two stage vacuum pump is ideal for automotive air conditioning and other operations that require steady vacuum pull from a compact pump.
The oil I use TSI Supercool Vacuum Pump Oil, Synthetic, 32 Oz, Clear (V32)
https://amzn.to/3k4SPJG
This is a must have tool if your doing HVAC https://amzn.to/3Z19hLf
Two stage pump draws vacuum down to 22.5 microns
Durable die cast aluminum housing and convenient top handle for easy maneuvering
Easy-access oil fill port with viewing window for easy maintenance (oil included)
Dual ports for R134A and R12/R22 systems
Thermal and current overload protection