Joined
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90 Posts
1992
525i
256,xxx
5 speed Manuel
I've been currently using 20w-50 Castrol high mileage oil... at one point I was running low on oil and seem like it was running good! Smooth idle after I topped it off it started running rough again.. the car drives fine however I can tell is has a rough idle is Bc of my loud Magna flow changed tone for a few seconds also if I sit in my car I could feel the slightly but noticeable rough idle... should I get thinner oil?
525i
256,xxx
5 speed Manuel
I've been currently using 20w-50 Castrol high mileage oil... at one point I was running low on oil and seem like it was running good! Smooth idle after I topped it off it started running rough again.. the car drives fine however I can tell is has a rough idle is Bc of my loud Magna flow changed tone for a few seconds also if I sit in my car I could feel the slightly but noticeable rough idle... should I get thinner oil?