My small stash of Mobil 1 ep is used up. I had a hard time finding the last two jugs. From my reading here the formula has changed, so I’m wondering what to buy next. This car is short tripped mon thru fri. We use it for around town driving often less than 15 miles total. The short trips are literally five city blocks. I change the oil every 3000-5000 or 6 months. I have used Mobil 1 ep. Amsoil xl, Kendall gt1, and maybe PP OR PUP. I have been going to Walmart lately to purchase oil because it is convenient. Withhballl that said what’s a good recommendation? We live in northeast Wisconsin if that helps.