If you have a fuel filter on a Power Tech Kubota engine that was purchased after 2012, then you might be asking yourself, what style fuel filter do I have? Power Tech introduced a new style fuel filter in 2012 called the Kubota D06 fuel filter. That filter replaced the Kubota D04 fuel filter. Because Power Tech generators are custom, we have continued to use the D04 filters on some applications. So, how do you tell the difference?