Walmart is selling its own brand Supertech full synthetic with warranty for 20K mile or 1 year, about $15 for 5 quarts, the same price as its older synthetic oils. Other brands would probably sell their 20K oils soon.
I drive about 20K miles a year, so this oil should help reduce oil change frequency. I hate to get dirty changing oil. So far so good.
I use this oil with Toyota oil filter to make sure engine is lubricated properly. I hate to bring the cars to cheap oil change places with cheap oil and cheap filter. You never know if their filter actually works.
Besides these cheap oil change places would always try to upsell you on other unneeded maintenance and repairs.
