Before this most recent purchase t6 Rotella 5w40 I could get for $17.00 (and some change) a gallon. Latest was $25.33 gal. The $17 gal price was buying in 5 gallon buckets. The $25.33 I had to buy a case of 3 one gallon Containers. My uncle is supposed to be getting me a price from his wholesale oil guy for mobile 1 and mobile delvac before the weekend. I have 5 diesels to keep oil in, truck, the tdi, 2 tractors and a generator. So I go through quite a bit just in them. Then add in the big block, (get the same 5w40 diesel oil) the expedition and the escape. The latter 2 get 10w30 and 5w20 respectively. I just keep a few gallons of the 10w30 and 5w20 on hand, but normally I have at least 10 gallons of 5w40 and I prefer to keep 20 or 25 gallons around. Seems oil change Intervals always hit one on top of another.
From being a heavy duty diesel mechanic and sitting through quite a few classes about oils and filters, I pretty much stick to oe filters or filters of proven quality. My cummins get fleet gaurd filters, kubota, gets kubota, (you get the point, yanmar get yanmar.) ID parts had all the oe filters for the jetta so, like you, I just ordered the complete filter kit to get started.
Figured it gives me a base line since I just recently got the car. Price was decent.
I'll likely get a case of oil and fuel filters eventually for it, I like to have spares on hand for everything. Normally you get case discounts as well. The car is in very good shape body wise, not hardly any rot on it, which is good for a North East car. So that case of filters won't go unused.