OIl change

[kmxar15]

what kind of oil should i put in 1993 325i its got 185k miles on it.

The oil needs to be something i will find in my local auto store.

[thekid]

If there has been synthetic in there, you should go with synthetic, castrol or mobile1... something like that.

If not, then choose your weight based on how long you will have the oil in there and what temperatures you are going to get during that time. You could go with a "safe" choice like 10w-30 but that is becoming a less popular option for varying reasons, but was the "default" weight for many years. Unless you live in a very cold climate that should be an ok choice. I like the regular castrol gtx for most things. That's just personal preference though, you'll get people swearing by most any other brand.

[walke40]

semi synthetic covers most of the temp range, unless of coarse U R a racing driver

[cjscopp]

Never been a synthetic oil man till recently as the wifes 2002 525 has synthetic in it. My question is with my daughters 1995 325i as it's time to change the oil. It does not have synthetic in it now and I wonder what experiences others have had with switching to synthetic after using conventional oils. Anyone?

[marti5]

Swapping from mineral to synth, I did this on my 7 with no probs at all, however I did add engine flush prior to draining the old oil, obviously change the fiter too, Ive been running on synth for 11 months now, everytime I do an oil level check, none used and is still crystal clear.