Delo 400 XSP SAE 15W-40 with ISOSYN Advanced Technology is an API CK-4 heavy duty engine oil specifically formulated for on-highway and off-highway applications including 2017 greenhouse gas (GHG ...

Beyond fuel efficiency, an advantage of properly formulated engine oils with better flow characteristics over those in the SAE 15W-40 grade, is the oil’s ability to reach lubrication points ...