Perhaps someone knows advice: opel atra g 1,6 16v bj. 98 cars is consistently checked book maintained. is always driven with brand sprite (super) on the highway sudden performance loss at approx. 180km/h, right approach, engine tuckers on three cylinders but runs. to atu, no compression on the 3rd cylinder at approx. 114tkm, valve burned, outlet valve, 3rd cylinder new tooth strap, water pump, tension roller (was almost due in turn), valves, cylinder head seal and new ignition candles on the road autobahn sudden loss of performance at approx. 180km/h, right approach, engine tuckers on three cylinders but runs. to atu, no compression on the 2nd cylinder at approx. 118tkm, valve burned off, outlet valve, 2nd cylinder does not tolerate higher speed or speeds from a certain running power? problems with continuous load etc.?