Just 5 months ago I thought my Hyundai dealership was moving out of the dark ages. Here is their oil change recommendation of 7,500 to 10,000 miles. Now it is promoting 3,000 mile or 3 month oil changes on their coupon. That coupon is the price of the recommended 3,750 mile oil change listed at MyHyundai for my 2017 Elantra at that dealership. Then they break down oil choices into conventional, semi-synthetic, and synthetic. I only had one oil change at my dealership. The service advisor refused to tell me what oil was going to be used. Fortunately, I can change my own oil for less then $20 with synthetic oil and OEM filter. I want to be able to trust the dealership, but this flip-flopping is not helping.