Paid for oil change, and only put 2 qarts in and started to here knocking ? Check for any leaks? None ,so checked oil ? Could not see any on dip stick? Put two and a half quarts in before I could see it on the dip stick! Lost oil psi took back to tires plus and they said motor is shot ! And offered two oil changes and told to leave, we, have a claim but not herd anything yet?