I am restoring my new toy, a 1977 Pontiac 400 (W-72) 4 speed Trans Am, (no a/c),(more fun again) anyway, motor seems fine but, we'll measure the bearings, pull the heads, etc., this engine runs a Crane/Pontiac "S" (.408 lift) cam and Crane 1.52 rockers and is Rochester Q Jet fueled...My Pontiac "expert" uses Castrol SAE 30 but, y'all taught me better, I plan on 6 mo oil changes and AC /Delco filter, car will be driven Less than 2K miles annually shows/cruises.. What brand/weight OTC oil? Chevron, Havoline, Castrol, Mobil, etc., ? 10W-30, 10W-40 or even 15W-40? Diesel type oil? Car will always be driven till "hot" w/o short trips, etc...please post and add a "why" you recommend your idea? The analysis are just toooo much for me to decipher? thanx in advance!