:h
There is another solution. For keeping the oil cleaner, longer.
Mind you, it IS gonna turn black eventually. No way around this.
But I always have a cheap bottle of CJ-4 compliant oil sitting around.
After opening the drain plug and letting all the old oil out, I always dump through one quart of this extra oil just to help clean out the black crud that seems to want to stay in the oil pan.
I can see the color change from black to the fresher color as this last, clean quart of oil, drains out.
Yeah, I know, wasting the money for that one quart. But, my oil does stay cleaner, clearer, longer.