Originally Posted by rooflessVW
Originally Posted by jkasch
Most OEM and aftermarket Eaton and twin-screw SCs have permanently sealed bearings, these days.
Yes, but are their gearboxes?
Yes.
The Hellcat, and Audi 3.0 both have serviceable superchargers. Is there anything more recent?
Originally Posted by slacktide_bitog
GM also lets you use M1 5w30 for the supercharger oil
Mobil AGL or ZFN-L-3001 are perfect as well, if you happen to have convenient access.
Neither my Hellcat, nor the Magnuson TVS that I installed on my '04 GTO, have/had any way to change or add oil. Dodge had an early ('15-'16) batch of twin-screw IHI SCs with bad bearings. They were replaced under warranty rather than repaired or serviced. '15 Hellcats were warranted for a 100,000. '16 and later have 60,000 mile warranties.