I know the VW dealership stocks Castrol Edge Professional OE 5w-40. My manual calls for 5w-30 or 5w-40, and I was thinking about switching to Mobile 1 ESP 5w-30. I am going to do my own changes and I was wondering if this would be a good change, or if there's another brand of oil that could be recommended. The car I am referring to is a 2016 Jetta Sport with the 1.8T Gen 3 engine and an APR Stage 1 tune with 48,000 miles. The reasons are of course price, performance, and longevity. I have used Mobile 1 in my Eclipse GSX and was always happy with it, just trying to find oil that's cheaper than almost $8/guart, with the same or better quality. It is a daily driver and I am not planning to modify it past the current tune. Also while I am asking, any particular oil filter brand that is recommended?