By Matt Snider
GM Lead Engineer, Oil Life System
Would you feed 25 bucks of your hard-earned money into a shredder? Would you drain a perfectly good tank of gasoline and replace it with new gas? Of course not. Yet, if you own a GM vehicle and change your oil every three months or 3,000 miles just because that little sticker on your windshield says so, you may be wasting your money.
Thanks to GM’s Oil Life System – a simple yet amazing technology that I’ve had the privilege to work on – the three-month/3,000-oil change is a myth that belongs in the automotive scrap heap with leaded gasoline and carburetors. There are more than 31 million vehicles on the road today equipped with the GM Oil Life System, and more than 97 percent of GM vehicles sold today in the U.S. are equipped with this technology. If everyone who has OLS used it as intended, we’d save 100 million gallons of motor oil every year.
Of course, oil is the lifeblood of your engine – without its special lubricating properties, an engine will cease to operate. The GM Oil Life System is based on an algorithm that “tells” vehicle owners when engine oil is wearing out and needs to be changed. And when it is time to change your oil, I recommend visiting your local Goodwrench service technician. The system is based on individual driving habits, so your recommended oil change intervals could be drastically different from your neighbor’s. But on average, a motorist who drives 15,000 miles a year could save two to three oil changes annually.
There’s an environmental reason for saving oil, too. We know many well-meaning home mechanics do not properly dispose of waste oil, and the California EPA says that one gallon of oil can contaminate a million gallons of water.
I talk to people who believe they can look at their dipstick and determine if their oil needs changing just by the color. That’s another myth. As an engineer and chemist, I’ve examined used motor oil from different vehicles that, on appearance, look the same. Yet, upon analysis, one still has useful life and the other doesn’t.
If you own a GM vehicle equipped with the GM Oil Life System and use it, your wallet and the environment will thank you. If you don’t use it, I encourage you to try it. After all, technology is way smarter than a window sticker.







