I used Techron on my old 240D with no adverse effects. But I did not feel it did as good a job as the Red Line and Lubro Moly products. I have also heard about running additives rigt before an oil change. I usually follow this rule because the theories behind it make sense to me.

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2001 Dodge Ram 2500 Cummins Turbo Diesel - 4x4, auto, 3.54 gears, long bed
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'92 300D 2.5 Turbodiesel - sold
'83 300D Turbodiesel - 4 speed manual/2.88 diff - sold
'87 300D Turbodiesel - sold
'82 300D Turbodiesel - sold