Car for commuting 70,000km a year

Hello Motor Talk Community, after my studies I got an attractive job offer, which is 135km away (Hin and back 270km). Since you have settled in in the new place in the years of your studies, I would like to avoid a move or a weekly apartment. Therefore I am looking for a car with which I can drive about 3-4 years. At 4 years would be 280.000km. I have already searched in the forum, unfortunately I found no questions about commuting with these distances Here are a few infos: Route (1 way): 127Km highway to a large extent without speed limit (approx. 80%), the remaining 8Km are approx. 1Km city and 7Km country road. Since the route is not very busy, I am looking for a car where I can drive with the average speed of 130Kmh. Thus the driving time is only 2 hours a day and is ok for commuting. Motor: Due to the distance I want to buy a solid diesel. Since I have no idea how the PS strength depends on the consumption I don’t need a horsepower car. I thought about 90-120hp?!?? Car: Appearance, equipment etc. I don’t care, I want a reliable car with which I can ride the route comfortably with the 130Kmh. My budget is about 17,000€-21.000€. Think about a used car up to 30,000km or a new car. If you have a proposal that is less than 17,000€ I don’t mind. For a new car, I would be happy about tips. I have come across the Hyundai CI30 or CI40 during my first search for information. Low consumption and also as a new car (14,000€) or very young used car in my price range. Could anyone give me concrete experience here? Also the 5 year guarantee without mileage limit would be interesting because of the distance. I would also like to hear about other suggestions or ideas. Thank you very much and a nice Sunday greeting Marv