Don't automatically accept "burn" .... check for obvious and easy repairs first like leaking valve cover, front cover seal, oil level sending unit etc.

These engines tend to be quite good and long lasting.

Do you see evidence of burning? How do the spark plugs look?

Haasman

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'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)