Hi all! This is my first post, after a few weeks lurking. I have a question about Quaker State oil. No one seems to mention it. I used to work at a muffler/brake shop and that's what we stocked, although the old timers said it was a discount oil and not up to the top of the line stuff like Castrol. Still, they had a 250,000 engine warranty with 4,000 mile change intervals. Does anyone have any experience with any of their products? Also, I read in an old post that people who ask for advice are really looking for an accomplice. Truer words never spoken. I have been using Mobil 1 5w-30 and a Mobil 1 filter (M110)in my 2000 Maxima and Delvac 1 5w-40 in my TDI Beetle. But the Autozone near me has German Castrol Syntec and the NAPA has Amsoil. I'm excited to change my oil in two months, do I need a hobby or what.