Went to use mine for the 3rd/4th time today after changing the oil and had issues pumping past 2000 microns. Switched to a 6CFM pump and had no issues.

Now that I'm thinking about it I didn't use Appion oil but standard vacuum pump oil that I use in every other pump. Anyone do this with negative effects? At time I was thinking it wouldn't make a difference but now I'm regretting my choice.

Any other feedback on this pump?