Using a thicker oil, like 15W-40, can help prevent leaks and provide adequate lubrication to these older engines. If you're wondering whether you can use 15W-40 oil in your engine, there are a ...

Delo 400 XSP SAE 15W-40 is a mixed-fleet engine oil recommended for naturally aspirated and turbocharged four-stroke diesel engines and four-stroke gasoline engines in which the API CK-4, API SN ...

If you're interested in learning more about the other types of engines that use 15W-40 oil, we've got you covered. Here's the deal with 15W-40 engine oil.