One day you take the car in to the mechanic you've been using for years for a tune-up, e.g., new plugs, wires, fuel filter, and clean the injectors. After a few thousand kilometers, the car runs terrible. Dissatisfied on the mechanic's work, you go and find a better one...an honest one (impossible?). By word-of-mouth we learned about "Chivo". I told my wife to take the car there to get it road worthy again. Besides having a real diagnostic computer, he seems to be an honest guy. This is what he found in our car's engine from our last "tune-up".Three of the four spark plugs are of different manufacture. Unbelievable!