In answer to your questions: 1. Castol 10W-50 2. Any of your Delorean part dealers ( See DML venders list). 3.Yes, but they will need special tool ( see previous listing on DML for this , or can have one made), to undo oil pan plug. 4.Yes, but take the time to be there in the pit with the person, that way you know it is done right.This is not a slam on Jiffy Lube, just a chance to get to inspect the underside of your ride. 5.Yes, it is located in the air filter box ( large black box on top of engine). 6.The bearing in the pulleys do go bad from time to time, call Delorean parts vender and get replacement, or if you know someone who is mechanically inclined the bearing can be found at Pep boys, take old one in and they can match it. You need to get a copy of the parts manual and the tech repair manual. ( Do a search on the net, I have seen parts manual downloadable for free.) Both of these will help you to better understand how you cars works, how to fix it and the various parts that go into the car. I also suggest that you take the time to review the old issues of the DML. Lots of great info to be found. Good luck on your new ride, with proper attention to the needs of your twenty plus year of auto, you too can enjoy and live the dream. Bruce Battles Vin# 06569