I have a few higher mileage vehicles that burn about 1.5 to 3 qts in a 3K mile interval if you use 5w-20 synthetic. If you bump up to a 5w-30 or 10w-30 conventional, it will slow down but frankly I have not monitored it to remember. I just scored a huge stash of 5w-20 and am wondering if by the act of the engine burning more oil will hurt anything. I will always keep up on the oil level as im OCD and always keep them full. If you need to know the oil consumption is from the valve seals, and it is a MAJOR job to do it and just not worth it. Vehiceles are mint otherwise.