And dude up top is wrong. Ive used compressor oil in a pinch. Didnt really care about the pump. Pump still pulls full vac 8 years later. (Not used much its a back ups back up 2 stage harbor freight) still has the compressor oil in it from 8 years ago…
Would i do this to my spd pumps? Hell no. But in a pinch hf sells it. Auto zone has actual vac pump fluid
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