At the risk of sparking heated debates I’m wondering if anyone else has had any experience with XADO oil treatment. http://www.xadoshop.com/index.html I used it in a water cooled VW with 187,000 miles that had been rode hard and put up wet and I must say that it did make an improvement in power, engine noise and overall smoothness of the engine. I’m thinking of using it in the Rover at 81,500 miles as well as switching to Amsoil synthetic at the next oil change. Rioja Red