Years ago I had a run in with Honda who claimed warranty expired because I did my own oil changes. Had a state of Illinois ombudsman in town ( since abolished ) who made one call and they backed down.
I do keep a notebook in my car and records every service from the day I bought it. I include date, mileage,type of service, if done by a business I record who, where and receipt number plus any warranty. example, wipers, mileage, date autozone, 6 months. Saves a ton of time and arguements.
2017 SLX 195RB
2014 Jeep Grand Cherokee Overland, gas 3.7 V6
Andersen WDH hitch
Dometic Milenco Aero mirrors