[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

[lateapex]

If one additive was able to remove the other additive's deposits then I would understand the benefit of switching brands of gasoline.  I do not think he presented any data to support his conclusion.

If you read his entire article, he said exactly that. Every additive package will create its own deposit; they all have some dry weight. Package A obviously cannot remove its own deposits, or it would not leave deposits. He is claiming that they observed a different mix of chemicals (package B or C) that was effective in removing basic gasoline deposits, AND package A’s deposits. The problem with always using package B or C is that they will leave their own unique deposits.

He probably cannot provide the results his department discovered for his employer, they would be proprietary.

I don’t think he mentioned it, but the deposits left by the additive package will usually build up only in the combustion chamber, not on the valves or in the fuel injectors. Chevron has published some tech articles explaining the solvent buildup problem.