Won't void the warranty, Won't harm the motor, Will protect it just fine with Mobil 1. Heck it is used as factory fill now for more cars than you can shake a stick at. Mercedes, Dodge Viper and SRT4 (I think on the second one), Corvette, Porsche. The machining finish on todays engines and there tolerances. no biggie. Fill and go.

Don't worry, Be happy!

I wouldn't do it till after the 1st oil change

Actually Royal Purple recommends waiting until 2000 miles.

yeah most oil changes are 3000 miles apart.

asking the dealer is about the worst thing you can do when you buy a car.........most of them are idiots....or they just don't care.

That is true

if u dont break it in properly do u loose horsepower? and what is the recommeded break in mileage? cuz i bought mine brand new and i was already running it at like 5 to 6rpm.

not all the time though

400 miles is fine for switching to synthetic. sure, more like 3k miles would be better, but absolutely nothing wrong will happen by switching that soon. if the motor isnt "broken in" by 400 miles, youve got other problems.

theres been plenty of tests showing that the engine can be built, started up, and ran hard without issues... 400 miles is much longer of a period of time "being easy" on a motor than what those other motors in the tests went through. heh.

That is true, but how long did they run these motor before they died? 100,000?