OK I bought a 1999 Corolla back in February and have since put on more than 16k miles. It currently has over 206k and runs very well. The one problem is I'm burning a qt of oil between 1000-1250 miles. It has a 4 qt sump and I add 2-3 qts in between my 5000 mile oil change. I'm currently using MaxLife 10w30, high mileage oil seems to help a bit, I usually just buy whatever oil change special there is at Autozone. My question is should I just keep doing what I'm doing or switch to an expensive synthetic. My problem with synthetics would be adding a qt every 1100 miles or so, also don't want to change a synthetic every 5-6 weeks either. I drive about 800 miles a week about 3-4 miles at a time. My gas mileage varies between 29-31 gallons. Our zone is suburban, rural but we do get the 5 o clock traffic jams. OK I am rambling. Should I just use whatever name brand high mileage and add oil as needed and keep with 5k change? Since at about 1250 miles I add a quart can I extend my OCI? or Use the cheapest oil and filter available? If so what OCI or Upgrade to a synthetic? If I still have the same consumption maybe top off with a good dino and change my OCI to about 7500 miles? Of course I want to do whats best economically feasible, if synthetic can extend my OCI or improve gas mileage it may be worth it. I'm just looking for opinions as I'm hallway thru my OCI. I do want the car to run, I know its a "beater" but its excellent for delivering pizzas for sure.