I've been changing my oil every since I bought my first vihicle at 3000 miles. I might let it slip to 3500 but that's it. It's something my grandfather and father did so I do the same. It might be unnecessary but God forbid anyone needs or would ever need a fully equipped wheelchair driver van. My first van cost me $45000 and that was in 85. I'm on my third van since my disability and am ready for a new one. Each one has avraraged 10 years. I'm going to be getting a new 18 model. Dropped floor, hand controls, auto opening doors, raised door entrance, low effort steering, ex lock chair lock down, remote control ECT ECT. That's even before the price of the van. Add an 18 e250 and I'm at 80 large. In all honesty I've never had any serious engine issues besides a sparkplug, coil tune up under the hood. I usually bring my vihicle to one of two quick lube oil change places but never use their 50 gallon drum oil. I go inside and purchase a large 6 quart and two extra quart's. I also buy a fram oil filter and air filter if needed. I don't trust the oil those places use. IMO they use recycled oil and oil is the lifeline of one's engine. I do the same for any fluids that need changing. My friends think I'm crazy for bringing my vihicle to the dealership for maintenance, brake pads, tune up etc etc. I don't think I've ever had a local Goodyear, or local garage repair something without something else happening a day later. Then you hear the same story, we fixed your issue this is something else that happened. Really a day or two after having an issue repaired a new one popped up. I learned my lesson after my first van. That stuff never happens at the dealership at least Ford. If there is an issue I bring it in and it's done. And it's done right the first time. Sure there's there's a premium for bringing your vehicle into the dealership but in my opinion it's worth every penny. To get back to the subject of the oil change. I didn't know that oil filters were built to actually fillter 10 thousand miles of oil. I will read the Box on my fram oil filter next time I go in for an oil change. Maybe I'm just stuck in the past and I am a creature of habit. Truthfully. I don't think I'll ever stop changing my vihicles oil at 3000. And I never used that synthetic stuff. Maybe I'm just too old to realize there might be a benefit. When they stop selling traditional oil then I'll have no choice to go synthetic. Thanks for your information. I'm obviously a stubborn person. Wait until you get old you too will understand. I was once young and open to ideas but I'm old and crusty. God I never thought I'd be old. It really sux. 73