I only use the cheapest dino oil for my Neons and all 5 have gotten over 200k miles with almost no oil consumption or power loss. The Neons get oil changes every 3000 miles. It's the rust that's killing them and why they got sold. I still have 2 Neons. For my Darts, I use the cheapest 0-20W synthetic I can find a Walmart. New Purolator filters every oil change and I change the oil every 5000 miles no matter what the oil monitor says. All oil has to pass the API and SAE standards so why pay more for a brand?