Just got a 1986 300SDL...am wondering, generally speaking, how the soot production of its engine would likely compare to that of my 1992 2.5 Turbo. My reason for asking: I did an oil analysis on the 1992 and found that I could easily go 10-15,000 miles before changing the oil. I'd like to aim for reasonably long drain intervals with the SDL, but I suppose I'd be cautious if it is likely to produce significantly more soot. I'll be using Mobil Delvac 1 synthetic.

Thanks.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 157k miles
06 E320 CDI "Rutherford", Black on Tan, 175k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 144k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 70k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife