OK, I'll bite. I have been lurking here for some time and I keep coming back to AutoRX. I finally took the plunge and ordered 4 bottles. I will initially use it in my '92 Mazda B-4000 with 135,000 miles. It currently runs fine and uses no oil between changes. I will pull the plugs and check the compression 'before' and 'after'. I have never had the valve covers off so I really don't know what it looks like down there. I have always used 10-30 dino (various brands), changing between 3000 and 4000 miles. I have never had any engine problems. I'll be reporting back after the treatment is completed. If I were to try to open up an oil filter, how can that be done without slicing my hand in the process? I think this would be too messy to do with my band saw.