Why do we have to change oil so often these days? The standard for cars and trucks was 2k-3k miles 30 years ago. But oils and filters are so much better than they have ever been. Cars and trucks now go 10k miles between oil changes, yet Honda, Polaris, and all the rest that make off road rigs say we have to change at 600 miles or 100 hours. Hell I can remember back in the 70's and 80's when motorcycles and three wheelers were lucky to get an oil change once a year and lasted 20-30 years before they gave out, same thing for cars and trucks. Just wondering why with today's oil and filters all manufactures require such frequent oil changes.