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Old 06-02-2002, 03:01 AM
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MikeTangas MikeTangas is offline
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Join Date: Apr 2000
Location: So. Cal
Posts: 4,430
Well, here's what I did on both the Suburban and the 560. I switched to Castrol Syntech semi-synthetic with no problems at all. I have logged almost 10K miles on the Suburban and over 4K on the 560 with no leaks. The 4.5 still runs full dino oil.

I was worried about possible leaks when I did the Suburban but those worries were gone by the time I got to the first oil change. My plan for the 560 is to try to switch to full synthetic at the next oil change.
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon least its a diesel

Non illegitemae carborundum.
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