yo guys i did my first oil change a couple of months ago and i got a letter from hyundai that said my car was over due for an oil change. I haven't been to the dealership in a while and haven't had the time to call them. i am just worried that they will void my warranty or if i ever want to sell the car they will say that i didnt do the required maintanence. I want to do all of my oil changes so should i just call them and tell them that im doin them or wut. Im gunna keep all the receipts from the oil and oil filter just to prove that im doin them.