Ask five drivers how often you should have your oil changed, and you'll get five different answers.
That's because there is no simple rule anymore as to how often to change the oil, as there was back in the 1980s and '90s when the rule was "every 3,000 miles." Even Jiffy Lube has finally dropped that recommendation from its advertising.
We found John Martini and his daughter waiting on an oil change for their pickup truck, which can go almost 10,000 miles between changes, according to his car's computer and the alert light on his dashboard.
But Martini is not so sure.
"It doesn't even come up to say you need an oil change till 10,000 miles. Then you check that oil and its black," Martini said. So he said he is not waiting as long before his next oil change.
Confusion among car owners
What makes it so confusing these days is that oil change shops will say one thing, but your car's handbook says another. And now your car's dashboard sensor may even tell you something else, as it is analyzing the oil based on use, which may be different from the handbook.
While Mercedes, BMW, Mini and other some makes now push the 10,000 mile range between changes in the newest cars, Adams says you are not going to to harm the engine by changing it a little more frequently, even with synthetic oil.
If you want to keep your car a long time...
Dan Sweet, Another body shop manager we spoke with, agrees that the new, longer intervals are convenient, but not necessarily a great idea for engine longevity.
He specializes in European cars, including some Volvos with 500,000 miles on them, and said if you want your car's engine to run well past 100,000 miles, he suggested changing the oil more often than the dashboard reminder tells you.
Sweet says old, black oil will clog many internal engine parts, resulting in a repair bill that can reach the thousands of dollars. He said he's seen it time and again.
Adams said even if the dashboard monitor indicates you still have 15 percent oil life remaining after almost a year of driving, "Don't push it. It doesn't make any sense. When in doubt, change the oil."
He said that extra oil change is $60 of "cheap insurance."