The experts at Diesel Care are constantly asked to explain the difference between Primary and Secondary fuel filtration, and now they have laid it out clearly. The main difference is when the fuel flows through the filter; it goes through the primary first and the secondary after the factory filter.

Which one is better will depend entirely on your personal needs and preference, and so Andrew Bourne, the director of Diesel Care recommends using either will protect your diesel from contaminated fuel.

To find out more information about Diesel Care’s filters, read their article in What’s Up Downunder #22 here and visit their website.