Part of a fun study I am doing. How many have a daily use pickup, that is used like a pickup, not just a big family car, that has 200,000 or more miles, AND, has never had anything but 30 grade oil. Whether it was/is 0W/5W/10W or straight 30, conventional, blend or full synthetic doesn't matter as long as it has/had 200,000 miles. Feel free to make any comments about your oil of choice.