How to Make Your Car Last Forever: Avoid Expensive Repairs, Improve Fuel Economy, Understand Your Warranty, Save Money

GM’s Oil Life Monitor (OLM) is a very accurate system. The caveat is to make sure every time you change the
oil you reset the system, or it will inaccurately report oil condition. There are other oil life monitoring systems
out there, and they need to be reset after each oil change too. Make sure you use the oil the carmaker
recommends or the system will be inaccurate as well.