Just did the bevel box oil today as well. What came out was still reasonably golden with no debris on the magnetic pick up. Re-filled with Red Line 80W140 using a Laser oil syringe - had to stick a short length of thinner hose into the end of the supplied hose to get into the fill port. Could have done with heating up the new oil a bit to get it to flow a bit easier but no big deal, will know better in future though in reality probably will just repeat the same mistake!
No discernable change in bevel box noise or tone afterwards.