Ed Pawlowski wrote:

"Evan" wrote
It has nothing to do with the engine oil change military
industrial complex wanting to stiff consumers out of
money for more frequent oil changes at all...

B S While you are correct for severe service, the oil change places just
put that 3000 mile sticker on the car as they have been for 50 years.
Under normal conditions, you can easily go 5000 to 7500 miles and not do
any damage. Oils and engines have changed since 1960. I remember it was
common to do rings and bearings on an engine at 50,000 miles. Those days
are long gone.
Hi,
Todya's engine and oil is more advanced compared to olden days. Like my
neighbors just delivered new BMW does not even have a dip stick. After
10K km oil change I never saw old oil coming out has color change or any
funny smell. If some one wants to change oil at 3K mile interval in most
cases that's waste of money and time.