Engine Rebuilding... a couple questions

[Kracka]

10W-30 is a good oil to use. Stay away from Royal Purple fluids though, their initial protection is good but their additive package breaks down VERY quickly. Do you want to run a full synthetic or not? I pesonally don't after reading all that I've read, but everyone has their preferences. Shell Rotella-T is a great conventional, but sometimes can be tough to find in 10W-30. Havoline is one of the top conventionals as is Motorcraft (both are very spendy though). My oil of choice is Chevron Supreme 10W-30; I run this in my S2000 and Laser and it shows great wear protection and long-life (UOA's prove this, I am not just stating my opinion). The reason I picked this oil is because of the quality (its one of the top conventionals) and the price ($.59/quart at Checker after MIR). Redline is among the best of the best synthetics, but its really expensive at ~$7-8/quart. Amsoil is another good one, but I hate all things that come out of Superior, WI so I will not recomend it. Mobil 1 is of course good, but I actually prefer Castrol Syntec since it shows better wear protection and doesn't run on the thin side of the viscosity rating like Mobil 1 does. Syntec is not a true synthetic though so it will not last as long as Mobil 1 will. The 3,000 mile oil change interval is a bunch of nonsense too. I keep my conventionals in for at least 4,000 miles on my cars or 5,000 miles on cars with "normal" engines (i.e. not boosted or reving out to 9k). I would not even consider changing out a synthetic on a DSM before 5k miles unless its a hardcore track beast. Personally, I'd probably do 7-8k miles on synthetic in a DSM but 10k+ would more than likely be perfectly safe.