I have a 2006 F250 6.0 diesel with 142k miles and last night I started hearing a ticking noise after driving it about 30 minutes. I noticed the noise only started after about 10-15mph and only occurred when pressing on the accelerator. I did not notice any additional noise or ticking at idle. The only thing I've done differently is when I filled up yesterday I added a bottle of injector cleaner which I made sure was safe for diesel engines. Basically I need to know if I should be worried about this clicking noise or if its just something that happens with higher mileage 6.0s? I've been searching the internet for hours but can't really seem to find anything concrete. Any ideas/help would be appreciated. Thanks!