just changed my oil and used Mobil 1 10w/30 and got to thinking about all the additives for oil and fuel that are out there and was wondering if you guys used any of them. on the VFAQ pages under the engine oil bible part it says only two companies have any real backup to what they sell. i was wanting to put some kind of additive in my next oil change but didn't know if i really should or even if it would really help anything. what do you guys think?

other than "RESTORE" (the stuff that comes in the silver can) I wouldn't suggest putting ANYTHING else in. The restore stuff helps lifter tick nicely.
Also, you'll want to stay away from any fuel additives or injector cleaners cause they can caused clogged injectors with all the crap they loosen up.