Posted in a 2.5l engine with a compression ratio of 13: 1 and the knock sensor. There were the same base gasoline for the same outdoor temperature on the same path, with the same tires and load following measurements performed 60-100km / h, 80-120km / h and 0-130km / h. The same should also be then performed with the additive again. First, however, the manufacturer's instructions have been adding strictly adhered to. In addition at least 30 liters in the tank must be, then again 22l was added -> thus the product reaches its best effect. The car is equipped with an E-CVT transmission and therefore incorrect measurements fall by another turn off. Furthermore, it was not measured with a stopwatch but with a datalogger that measures exactly 0,000sec. (No tachometer km / h but real km / h) To make it short ... it was aware from the outset that no normal fuel and no additives noticeably improve acceleration causes but I hoped at least to a measurable difference. Unfortunately, none of the measurements, a positive effect was observed = the exact same times as before. The two star's really only because of the faster customer service when you write to the manufacturer by e-mail.