I just hit 100k on my truck. What kinds of preventative maintenance should I be considering? Owners manual doesn't mention any work on injectors until I hit 100k, but seems like I've read here that one shouldn't wait that long. I've kept up with all other recommended preventative maintenance identified in the Service Manual. If I'm having work done on the injectors, should I consider installing new ones? If I go bigger, that means I'd probably need to replace my clutch. $$$! Any suggestions/recommendations would be appreciated.