Aimstraight,

I use 30wt motorcycle fork oil (Fuchs) in my MP-46M, with complete satisfaction.

Fork oil is o-ring/seal friendly, and is packed with extreme pressure & anti-wear additives.

I was recommended to use heavy fork oil by Mr. Tim McMurray (the maker of the 'Special Sauce').

I use two (2) drops down the transfer port, and two (2) drops onto the piston seal every five hundred (500) pellets.

I use a mix of the fork oil + moly powder for the pivots & cocking linkages.

Have fun & a good Sunday

Best regards

Russ