This engine was probably close to the mileage I had on my old one, after 8 months of drive time with normal maintenance the engine failed. I’m currently rebuilding it. The pistons are COVERED in carbon, one of the piston rods was so loose I’m surprised the engine didn’t grenade, and the amount of sludge built up in the upper oil pan was horrendous. I am not pleased with the quality of this replacement in the slightest. I’ll be reaching out for further assistance.