After a wet duck hunt, the next mooring the check engine light went on. Brought to the dealer and it was diagnosed as a failed seal and replacing the Boot as too much air was getting into the fuel/air mixture. OK. three weeks later same thing. Brought it back to the dealer. Asked me about the fuel. I used premium and was told its harder to start when cold and maybe the cause. Now they are not sure but are replacing the belt ( I guess timing belt?). They also are checkin g the fuel pump pressure. Question: how many of you used Premium fuel? How many have check engine go off. Its a 2018 Ranger with about 50 hours. Thanks Steve in Portage Wisconsin (Yes I got a buck).