I know I've asked about it a while back, but I'm still unclear as to what oil choices to use. Even the aircooled VW forums everybody talks about basically every oil under the sun. It's a 1970 VW Beetle with a 1500 single port. It won't be driven in our extremely frigid winters here in Phoenix and probably not driven in our 110 degree heat, although I'd like an oil that can handle the heat. I know VW's oil recommendations from 45 years ago is quite out of date, so I don't really see the benefit of single grade oils. What would be the perfect weight? Does an engine like this need a thick oil at startup? Would a synthetic oil help the engine run cooler? I'm thinking a 40 weight oil, and maybe I can mix it with a 50 weight, I just don't know. I'm open to synthetic oils but it doesn't have to be. It leaks oil like 99% of old VWs out there do although it isn't excessive leaking. Also I know the oil "filter" is just a metal screen and synthetic won't really help with extended drain intervals but this csr gets maybe 2,500 miles a year on it so a yearly OCI is probably fine. I'm not really interested in choosing an oil that's a little cheaper than another, so just because one oil is $16 instead of $25 doesn't matter at all, I just want what'll make it run the best/ make it last the longest. Thanks guys.