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E30 (1982 - 1993)
God's Chariot. The E30 was produced primarily from 1982 through 1991. The cabriolet was the one exception which was produced through 1993.

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  #1  
Old 10-23-2014, 03:31 PM
magendim magendim is offline
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My Experience with Syth Motor Oil So Far....

So I had my E30 (283K) in for service for some oil leaks and a few other items. In the course of the work, they had to change the oil and they used 5-30W full synthetic vs the 20-50W dino I've always used. Didn't really notice it until a week or do after when I was fling away the service paperwork. But, so far, no issues & no leaks...
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  #2  
Old 10-23-2014, 03:51 PM
RainyRider RainyRider is offline
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Ya, I wonder if should just go with syn oil in the M20. It will have to wait till two more oil changes since I already have 20-50 on hand.
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Old 10-23-2014, 09:18 PM
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sixpot_simon sixpot_simon is online now
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Nice one, magendim.

A lot of folks are scared of putting synthetic oil in old engines because it will cause leaks. I reckon, if it leaks then the seals need replacing, it's not a "fault" with the oil. Running thicker as a bandaid fix for worn out seals is a silly idea IMHO.
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Old 10-23-2014, 09:44 PM
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downhiller downhiller is offline
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but it works and makes up for lost oil pressure due to wear on bearings and what not.
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Old 10-24-2014, 09:31 AM
markseven markseven is offline
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OP, I would go 40 weight (10/40 for example) at least in terms of hot-side viscosity. Synth / no synth is your call. IMO the M20 has adequate filtration to be effective through the extended oil change interval.
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Old 10-24-2014, 08:50 PM
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Quote:
Originally Posted by downhiller View Post
but it works and makes up for lost oil pressure due to wear on bearings and what not.
Fair enough. My soapbox rant was meant to be about the external seals, not internal moving parts.
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Old 10-24-2014, 09:11 PM
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downhiller downhiller is offline
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same principle. bigger molecule so harder to seep thru gaskets/seals
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Old 11-02-2014, 04:00 PM
magendim magendim is offline
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Ok, so after a couple more weeks of driving, I think I have found an issue with the synthetic. The car seems to use twice as much oil now... The engine has been well cleaned and it's not leaking but, at 283K, I do have a 1-2 cylinders with worn rings/valve guides. With dino 20-50W I would put a quart in every 600-700 miles. Now it's using a quart every 300 miles...

I will likely use up the spare syth oil I have and then switch back to dino...
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