there are MB engines that have gone over 500k ,I doubt that they had all the oil drained out tthe cooler everytime.

but, on a side note, I have been toying with th eidea of having the rubber on my lines replaced, to save $$. but also to add a T for a temp sensor, and possibly to drain the oil.

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1984 123.193 372,xxx miles, room for Seven.

1999 Dodge Durango Cummins 4BTAA 47RE 5k lb 4x4 getting 25+mpgs, room for Seven.