HI I have a 2004 f-250 which has 100800 miles on it currently since about 97000 miles I have noticed a ticking noise in the motor. Is this something I should be concerned about or is there something I can put in the oil and addative or something to make the noise go away. I have not noticed any lack in power worsened gas mileage or anything else the tick concernes me. thank you for your help.