threebyfour
Registered User
So last week i changed oil im my 91 with 120k on it, went to royal purple 5w30 and now when its cold i get a rattle from low in the engine, not quite a knocking but certainly noticeable, I think before i was running the same weight of oil but it was pensoil syn. Could i just add some kind of additive to quell the noise or should i be worried?