That 3,000 mile oil change thing was invented by oil change places. Newer cars, full synthetic should be every 10k miles or 8 months whichever comes first. Every manual for every vehicle is different, will say a different amount of miles between changes, but when you're paying $8-$10 dollars a quart it's for a reason. I drive my vehicles till the wheels fall off, I hate car notes. My current ride is a 2001 silverado ext cab, with 260,000 miles and I do almost 8k miles on conventional oil before I change it. Truck still drives and sounds like a new one.
Beer. The reason i wake up every afternoon.