Frank, I've had great things to report on my Volvo 960 station wagon since I tried Auto Rx back during the summer. First after putting 180,000 miles on the car I had noticed that every 5000 miles between oil changes that I was using around a quart of oil between changes. Along with oil usage that had me wondering how long I had left on this vehicle. I noticed that when driving long miles on the interstates on my job the high speed trips 70 to 80 mph for extended amounts of time when I got out to refuel and check under the hood I would find the oil dip stick would be pushed out of its tube with the rubber washer on the dipstick pushed just out of the tube housing it. This was a clear sign of blow by and it was happening on long trips at sustained high speed. After following your instructions and doing the two can treatment I'm happy to report not only has my oil usage greatly diminished but also after long trips at high speed the oil dipstick is in the place its suppose to be snugly in its place. This to me means no blow by or so little now that I can't tell it. Also the top of the engine stays nice and clean now no oil blowing by the  oil filler on the top of the block.