I agree with MD (maybe not suprising, that).

Colour just doesn't matter (unless it is milky white). It has nothing to do with the quality or lubricating quality of the oil.

If you had a diesel, your oil would be black in 100 miles or so. Similarly, it would mean nothing about the quality of the oil.

To understand why this situation exists, we need to go back to the campaign that was conducted by the oil change industry over the past thirty years or so. The convinced everyone to do 3000 mile oil changes, and they used the colour of the oil in their ads as a reason. It was bogus then, and it is bogus now. It is amazing how many people still believe it, though, with respect to the colour. And some even still do 3000 mile oil changes on a vehicle designed to run a lifetime at intervals of 4 to 5 times that.

Additives in your sump can be dangerous and destructive. They don't always play nicely with the seals your engine uses, and there is a lot of variability with respect to the concentrations that are either safe or effective. Putting in too much can kill an engine.

I won't put Seafoam in an engine that I care about. If it was a junker, and I wanted to clean it out, I would use my own naptha (which is much cheaper), I wouldn't pay their price for it. Naptha is sold as camp stove fuel, or white gas. Just remember that it doesn't lubricate anything, so after you run your engine for a few minutes, drain out the oil and put clean oil in, don't leave it in there.

It is much better to simply do a hot oil change. Put in the proper oil. Do another in 1000 miles. You can repeat the cycle again if you like, but there are rapidly diminishing returns to that.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue