Tier 4 engines

OK I have heard a lot about the famous Tier 4 engines and Doosan mostly . I have heard that most of you gents run out and buy new fuel filters at a moments notice when your Doosan does not respond to full throttle or just cant get up and move . Because of the cold . Would it be that the fuel is jelled or just plugged . Would it not be an issue to use a heat gun on the filter to unjell the fuel or is it just crappy fuel . Sorry guys but I cant see myself buying new filters if the fuel is going solid . I have had to heat up kubota filters to get the fuel to flow as well . Hey i am just askin , is it just crappy fuel . All of my equipment I fill up at the pumps at the gas station . No issues . The only problem with the Doosan Its hard to start in the cold . The Kubotas usually fire right up . If we could just get the makers to put a Cummins in all of this little stuff we could end this forum . All of my 580 Case had Cummins no friggen issues .

Tier 4 engines