I have an '03 Accent manual trans at 40,000 miles that runs great. I have it serviced at Terrible Herbst every 3mos/3,000 miles for oil change and fluid fill/check. At 30,000 miles I replaced the spark plugs per the owner manual's scheduled maintenance (I keep detailed records).
I decided to have my latest oil change done at a dealership and have them also do a multipoint inspection, which showed everything was in the green. The dealerships have their own maintenance schedule per every x number of miles, some of which are extensive and expensive, but not listed in the actual owners manual maintenance schedule. I always figured these where just a rip off. The service manager put great emphasis on me coming back in for my 45,000 mile maintenance package to have this that and the other done. I said "sure thing" . Am I correct to avoid them during these dealer scheduled maintenance milestones? Now that the car is getting on in miles I want them to do the 3mo./3,000 routine, but that's all I want them to do, unless something is actually wrong. For instance, I got one other oil change + multi point inspection done at like 20,000 miles or so, and they decided that the (under warranty) battery needed to be replaced (live in very hot desert). I figure I've passed up probably an extra $1,000 worth of dealership scheduled maintenances done, and the car is, according to them, in 100% perfect condition.