what makes it burn oil

Yup that covers it. If you tell us when it burns oil we may be able to narrow down the issue. Does it do it all the time. After you start it. After reving it up? The more details the better.

I'm burning a quart a week, driving for uber. My car is a 2012 with 44k miles on it. I drive about 3k miles a month and change oil monthly, adding 5 quarts between oil changes. No oil leak, nothing going into radiator, all has been monitored.

I HAVE AN 2015 KIA OPTIMA EVERYTIME I STEP ON THE GAS TO FLOOR IT I HAVE TO CHECK MY OIL STICK , SO BASICALLY IM PUTTING OIL IN MY CAR EVERY 2 DAYS , WHERE IS THE OIL GOIN NO SIGN OF LEAKS

I would check your PCV for proper function. If your car is still under warranty I would take it to your dealer but I think you have a serious engine problem.

I have 2011 Kia Optima same issue. It's like it's eating the oil. No burning smell just disappears no leaks either

I have a 2013 kia optima uses a quart of oil a week no leaks on the ground no smoke have new pcv valve i see that this is a common thing on a kia by reading questions previous to mine and this is normal around town driving.