I bought a 2004 Impala in 2005 with 12K on it. Since it was new enough to be under factory warranty, I started an Excel spreadsheet showing oil changes, tire rotations, brakes...I liked it so I started keeping track of everything...Then we bought a second car and a third...I have always backed my data up; so now, 11 years later, I have records showing everything done to 4 cars.
My spreadsheet is ONE one of the reasons I stopped doing business at the local stealership. Every time my wife went in for a $35 oil change, she would come home with 5 pages of work the dealer said needed to be done...brake pads, coolant flush, change belts & hoses, air filter, radiator cap, wipers, etc.
Meanwhile, what absolutely INFURIATED me (time and again), would be that I would go running out to her car, get out a jack, remove a front tire, and the brake pads have 3 times as much wear left as what the dealer stated, things like THEY would recommend a coolant flush when I had a receipt that THEY did it about 90-110 days ago.
The straw that broke the camel's back was when I was out of town for work and my wife called me and said she had a brake light out. I told her to go to the dealer where we had already spent several thousand dollars that year on maintenance...I thought they MIGHT spend 5 minutes replacing the bulb as a courtesy to a good customer...They changed the bulb all right...and gave my wife a bill for $45 with a straight face. My wife paid the bill and when I got home I just decided that's it. They got their $45 and lost a customer. And no, I didn't bother to complain to anyone, I just don't need their [censored]. That was Jan. 14, 2010. Haven't been to a stealership since.
Right now I can tell you the last date the wipers were changed on 3 out of 4 cars. I can tell you with absolute certainty that no one else cares as much about your cars as you do, and if you don't care enough to keep records, well then, no one cares.