Everytime I go to my moms house ill check her oil in the camry and I got to add sometimes 2 to 3 qts of oil. Most of the time ill check it and theres nothing on the stick. It doesn't smoke at all and for some reason the car keeps going strong. Its not leaking it because I checked many times. Whats going on. The car calls for 5w20. She runs dino and cheap carquest filters. Should I run something else maybe hm oil 5w30 in it now. its got 147,000 miles on it. I don't remember the year of the car. Its making me wonder were all the oils going. Like I said no smoke out the tail pipe and the bottom of the car is bone dry. She parks in the same spot in the garage and still never a drop of oil on the concrete.