My girl has a 2005 Mitsubishi Endeavor (3.8 V6) with about 48k miles. I always keep adding oil because apparently it burns oil, and it hasn't had the oil changed in a long time.. For this car I am looking for something cheap that will allow me to run it for a long OCI because I do NOT intend to crawl under this thing often. And hopefully clean the engine. It takes 5W20 according to the oil cap.. and takes less than 5qts.. which I think is very little for the size of the engine. She drives 5 minutes to school in the mornings, and then 25 minutes to an institute, and then 25 minutes back home. this is in Florida.. in the summer it is between 80-90F, and winter it can be from 35 to 60F. My thoughts was: -$17 Jug of Supertech synthetic 5W30... -maybe $11 jug of Mobil Clean 5000 5W20 or 5W30 -$9.50 jug of Supertech Conventional 5W20 or 5W30 Any cheap 0W20 or 0W30s out there?? What do you'll recommend for how long the car gets driven/ and my requirement?