Review on 16.9 Oz Rislone Nano Prime Synthetic Engine Oil Additive by Nathan Jankowski

I have a 1999 Jeep Cherokee with a 4.0 liter inline six. great engine, but I kept getting a miss fire in cylinder 6. One mechanic wanted to do a valve and head job, but a trusted mechnic, Johnny, who has a jeep 4.0 liter with 250,000 miles, said it was probably a sticking valve and told me me add Rislone. I did and some 2000 miles later, no more missfires.