I wondered about the same thing back in 2002 and asked Bushy tech support.....
-----Original Message-----
Sent: Thursday, August 08, 2002 10:42 AM
To: Matt Hasty
Subject: RE: XM15 E2S M4 Type 16in Carbine
Thank you for all your help and the quick responses. To save me some shopping time, do you mind telling me which brand of motor oil your factory uses. I understand that it must be none-drying, none-detergent motor oil that won't attack nickel acetate sealant finish. It probably won't be hard to find one which meets the first two criteria. However, I think most motor oil labels don't have statements about the nickel finish. It surely will save me some time if you would let me know which ones to buy. Thanks.
-----Original Message-----
From:
[email protected]Sent: Thursday, August 08, 2002 1:02 PM
Since we buy it by the case we usually get whatever is on sale at the local Wal-Mart store. The one currently being used is the Wal-mart brand 10W30 Super Tech.