There's no reason at all you should use an additive in a new engine like that. Synthetic oils offer more then enough protection. If those additives did something, you would see all the racers using some sort of it. They show them using it for advertising purposes, but they really don't. If you still are unsure, I would get a hold of an engine builder, and ask them their opinion.
My friend owns CAM2 oil, and what I'm told, synthetics are the best. You pay enough for syn. oil as it is, why dump more money into an oil change.
*FYI- synthetic oils free up 1-3%HP, and the usual 3000 mile oil change can be bumped up to almost 10000 miles.
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1997 Thunderbird 4.6L: Black w/ grey leather Modified mustang MAC Cold air into ram air, Motorsport 9mm wires, Soon: custom exhaust, chip, built Trans,. yadda yadda yadda
Recently totaled (tear): 91 LX 5.0L 5 spd Red w/ black interior
2 chamber flowmasters, Bassani off-road X-pipe, MAC cold air induction, Kirban short throw, Heavy duty 3 core radiator, FMS 3:73's, Timing bump to 14 degrees, SRP billet racing pedals, Kenwood sound system
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