I especially carry it in the the E300 now cause of the leak. Back when I had my 82 300D I drove it to Harrisburg, I had an oil leak but found out at the gas station it was a little more than I expected... Well, at the station when I checked the dipstick the little bottle of 5W40s saved me. I bought more for the ride back and made it. I always expect something with these older diesels.

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Only diesels in this driveway.
2005 E320 CDI 243k Black/Black
2008 Chevy 3500HD Duramax 340k
2004 Chevy 2500HD Duramax 220k