15w40 dino rotella. Mean leak in either the front or rear seal. Don't want to pay for synthetic oil changes every 2500 to 3000 miles. Block Heater timed to 4am. fires right up.

I put 0w30 in my e320 though...Seems great. 5k changes take much longer to get to

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77' 300D, "Cartman" SOLD @ 150K (didn't know what I had)
83' 300SD, "The Superdon" 325k+ @ 28mpg
95 E320 wagon, "Millennium Falcon" 231k+ @ 24 Mpg
95 E300D, "Sherley" 308k @ 33.69 Mpg, currently anticipating a head
99 Suzuki Intruder "Trudy" @ 45 mpg