Don't use additives with any form of teflon in them. Teflon WILL clog your engines oil system. DuPont actually filed a suit to prevent their products from being used in oil additives for exactly this reason. The only reason DuPont sells their material to these companies is due to the fact that they cannot be held liable for any damage that is done. You couldn't pay me to put additives in my oil. You can read more at www.probetalk.com/forums/showthread.php?s=&threadid=1700989168 and more about HLA ticking here www.probetalk.com/forums/showthread.php?s=&threadid=1700972748.
The only way to quiet those HLAs for good is the revised oil pump. Covering them up with additives is like leaving a ticking time bomb in your car. HLAs run about $40 a piece and if you leave that pump in there long enough you could be looking at up to $640 worth of damage for just the HLAs, not including other valvetrain damage.
Dave
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