[lateapex]

Some of you may be familiar with this article, but it appears that it is best to switch gasoline brands at certain intervals to minimize deposit buildups.

The author says he works for the largest gas retailer in the world, has 28 patents, and his specialty is gasoline additives. He has invented some for his employer.

http://vettenet.org/octane.html

[roy]

Easy there guy, Not here to get in an Arguement or to be condescending, Just stating what I know.
Chevron an Texaco not an option over here , the best it gets is ESSO, Shell ,or Aral.
But after twenty years of tearing apart Military gasoline engines both mobile and fix station , I never seen no real deposits that amounted to anything or that would cause anyone to get alarmed about. We did get less carbon build up on the tops of pistons when we switched from leaded to unleaded and then from carburaters to fuel injection.
As long as people purchase good quality fresh gas from a credible source, then there is not a problem to keeping fuel systems clean.

On a side note, I do have both BMW and Porsche owner manuals, I see nothing in there about Techron II, so this must be a North American thing.