Our site shows videos and photos of oil coming out golden clean, each of these vehicles had their own unique journey to get their oil that clean. Here are some factors you must consider if you're goal is to get your oil to come out that clean: • Get our filter installed as early as possible. The newer the vehicle the better. This way we're preventing soot particle buildup rather than working through the old soot that's cycling in your system • Give it time. We had trucks run through 3-4 filter element change intervals before the oil came out visibly clean. • Monitor your progress with oil analysis. There is no need to have "faith" in our system when you have access to proof that it's working. Oil analysis will monitor the soot particle count, and you can see that numbers improve through-out time. • Results vary due to the filter size, flow rate, vehicle usage (towing, uphill, long distance), and the original oil condition.