Let's just say standard 10-year-old car. Honda Accord and Ford Fusion. If someone asks for a 100k tune-up, what do you recommend? - spark plugs - serp belt - brake and coolant flush, coolant at the very least - A timing belt (if it has one) (Honda V6s) I often get asked, "get my car is coming up 100k or 10 years old now, what should i get done", obviously assuming its running decent and doesn't need brakes, wheels bearings, control arms, ball joints and etc. I wanna throw the valve cover gasket in there as well. For the most part its easy simple work, i don't mind getting paid to help them do it. Other than no timing belt jobs, too much risk on my end. Cars these days don't exactly need much to keep on running, other than just replace what is broken. But i only started driving in the early 2000s but my parent's car didn't need much work either, they had like a 88 corolla and a 94 Camry. Just oil changes every 3k.