***Myth*** Engine oil should be changed every 3000 miles.
Reality: The last time engines required oil changes as frequently as every 3000 miles was in the mid 1960s, except for turbocharged cars in the 80s. Unleaded fuels and clean-burning engines of today require fewer oil changes, typically on the order of 7000-10,000 miles. Consult your owners’ manual and trust the engineers who designed the engines, not the fast-lube industry marketing folks who advocate 3000-mile changes. – Centric Auto