I could write a long post, but I'll keep it short. I'd normally suggest 5W-40. If your climate is cold,you might be OK with a 5w-30, or 0W-40 in the winter. What are your temperature ranges winter and summer?Any recommendation on what type of oil to use? I've seen 5w30, 0w40, 10w40 recommended.. I'm a bit confused on what would be the best to use. I know it has to have the ACEA A3 certification but that does not really narrow down what weight of oil I should use. If it makes a difference I live in Canada in a relatively cold climate but the car is only driven in the warmer months, perhaps as low as 5-10 degrees on the colder spring/fall mornings.
The only hose I don't suggest you use silicone for is that hose from the nipple, to the check valve and then onward. Silicone will weep oil in that location. I recommend oil/gas resistant hose for that one. BUT, I will note that a lot of folks here have used silicone, it's weeped, but it's been fine.Thanks! Also, the smaller hose that comes off to the side that goes to the check valve, do you know if that can be replaced with silicone hose?
You'll probably break the check valve in that line when you start moving it around. Most are old and brittle. You can use a generic one from the local parts store, etc. Saab sold the lines and valve for $30... you don't need that.