Industry standards for engine oil consumption on vehicles with less than 50K mile is 1 quart per 1000 miles. Vehicle over 50K are 1 quart per 750 miles. This is not to say your vehicle will use this much oil, it is a guideline for what is considered "normal". Other things must be taken into consideration such as oil leaks and wear on internal components such as valve guide seals. Note: All vehicle owners manuals advice to check your engine oil everytime you fill the fuel tank.