I have this pump to create a vacuum in my air conditioner on my Ford Ranger truck. Like other reviews mine was covered in oil, obviously not all the oil came out of the unit and the fact that the UPS is likely tossing the box doesn't help the matter. Luckily the oil bottle was still sealed. After wiping everything down and filling the sight glass with oil, I stuck it in my Ford Ranger for 30 minutes and the gauges were -30psi. Very good! That thing is pretty quiet! I was surprised how dirty the oil gets after the first use. After reading it is recommended to change the oil EVERY time. So the oil is cheap so I'll do it. Or at least after heavy use. I plan to change it after each use. All in all, this and the FJC 6761 R134a Aluminum Pressure Gauge Kit has allowed me to complete and fully charge my A/C in my truck. rose from 80-90 degrees to 59 degrees! So happy! -Nigel
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