After using WIX filters in a variety of applications for many years, I purchased them for a Sinister Diesel coolant filtration system for a 2004 Ford 6.0 diesel car. I changed the 1st filter 500 miles after the original install and am working on the 2nd filter. Not sure what the negative review is about, maybe they leave them on for too long, but they seem a good fit for the app. Of course I found them elsewhere for a better price and bought a box of them.