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Re: Nippy oil turned a light grey

Accumulation of water was certainly damaging with original oils but am surprised modern goes grey due only condensation. Esp to the extent of being evident on the dipstick. Are you using a classic oil of mere API SB rating or suchlike?

The habit of starting cars just to move in and out of the garage is best avoided. I still push family cars to avoid a cold short starts.

On sleeve valve cars it used to be reckoned that these improved with mileage and carbon build up but usually undesirable. Clogged oil rings were a feature of engines years ago.

Oil companies often claim that modern oils will prevent deposits but not substantially remove, but many consider modern oil will release sediment accumulated in the oilways, the usual reason for avoiding. I suspect a long hot run will likely do this anyway.

Location: Auckland, NZ