On my 85 380SE, 105,000 miles I have no oil leaks and have not had to add oil between changes, except just recently. I checked my logs and I usually have changed oil about every 3 months or 2000-3000 miles. The other day I noticed some chain nosie on start up and thought well, time for the new guides and tensioner, and chain. Checked oil and I had to add about 1/1/2-almost 2 quarts. It was last changed in February '06 and has about 4,000 miles since then. No more chain noise but this is first time I noticed any oil usage and wondered what others experience. I have always used Castrol 10-40, sometimes 20-50 but at last change I used a house brand high milage oil and wondered if this may have accounted for the oil usage.

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95 E420 ( 76K) SOLD
85 380SE(125k)
95 SL500(72k)