Boy you opened a can of worms asking that question, you are going to get a different answer from just about everyone. This is going to end up being a personal preference. In older previous vehicles I used to use just standard Valvoline and change every 3000 miles religiously. As cars get more High Tech, several of our cars actually have some sort of Viscosity sensor which actually lights an idiot light that tells us when to change oil. Typically between 8,000 and 10,000 miles. Personally we use Mobil 1 and change oil as the owners manual indicates. The old ritual of changing oil every 3,000 miles is a waste of money these days, oil too has made huge advancements in quality and changing oil that frequently is only adding to the Billions of dollars of profit that the oil companies are already making. Good Luck in making your decision!