After my third engine was installed, I prommised Jasper I would advertise and spread the word every where I could about their product and warranty, if it did not give satisfactory service. Guess what? Unlike Jasper, I'm keeping my prommise and integrity. The first engine failed (knocking) after a little more than 11, 000 miles, installed in 2006. The second engine (warranty repalcement) smoked from the time it was first crancked (Bad head). The third just failed, (knocking) after just a little over 14, 000 miles. That is a long way... read full review »