Vehicle Speed Control Related Problems of the 2014 Hyundai Veloster

Vehicle Speed Control problem

The car lost power gradually ;when I was driving ; we were on the freeway and I couldn’t continue driving 60 miles per hour , therefore I turned on the turn signals cause I just could drive at 35 miles per hour and the car just start shaking ; I just look for the next exit by the time we were on risk on the emergency lane for along time cause the next exit was to far from there . And the car was too slow ,when we finally got exit I call and I stop my car and call the mechanic to ask for help and he help me plug in the scanner machine to my car and there was a problem with some cylinders and one valve and I decided to called to the dealer to get an appointment:. My vehicule already was checking for Hyundai but they just text me a message ; they said my car needs to replace a motor ,turbo ; some broken valves causing zero pounds of compression on cylinder 4-long block repair-new intake and exhaust manifolds (including turbo)required due to broken valve sending metal through the entire system -quote long block/intake and exhaust manifolds /turbo /all necessary gaskets and fluids for repair : I just was noted my car was consuming too much oil, cause the car board showed me 3 weeks ago and I need to add oil ,and the mechanic plugged in the scanner; but it doesn’t showed something else ;therefore 3 weeks ago I added 1/4 or more ; then was 2 week ago; I added 1/4 of oil again and then just last week I added 1/4 or more oil again ;I just was checking the oil constantly. ; and it should be noted that the car was not leaking oil but I didn’t understand why it was running out so quickly .