In my continuing quest to try to understand what my engine is telling me...

Start engine, instantly pull off oil cap. No oil mist in blowby, put hand over oil filler hole and theres very little air coming out. Looks ideal.

Within 30 seconds oil (or diesel?) (gray-ish, not blue)mist appears and puffs more out of the cover. It puffs more than other 676/617's Ive seen.

What could that mean? If it was low compression, wouldn't the blow-by reduce as the engine warmed up due to ring expansion?

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'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
'82 300D, 'Tex', 228k body / 170k engine ... summer car
'83 300TD Cali Wagon 210k, wife's car