Look, I have no idea if they actually help the engine, but I love the concept and I am too lazy to do oil analysis to find out more. One real benefit was when my oil sending gauge showed zero as I was climbing a grade with a 41' 5th wheel, I was able to pull over and remove the oil fill cap to see the oil still pumping which saved our trip. If that's not making sense, their kit for these filters has the return line going into the fill cap, hence the oil stream.

its a great product price way too high

Thanks so much for this product. Installation is easy. More importantly is my oil looks so much better now after only a few thousand miles.

I put the Dual Filter System on and switched to the top Quality Oil and Filters on my GMC gas powered 2500 pickup in 2000 when the truck was new, and purchased to tow a 34’ Airstream Travel Trailer. By 2004 I had put just over 100,000 miles on the truck with about 90% of that towing the trailer. Changed the oil one time each year and the filters two times each year and had no problems at all. I purchased a 2004 GMC Duramax Diesel 2500, again for towing the Airstream. I installed the Dual Filter System After breaking.. I put 125,000 miles on the truck mostly towing the Airstream, then sold it to a friend that told me yesterday he had 212,000 miles on it now using the AMSOIL and Filters I supplied him. I purchased a 2015 Chevy Duramax 3500 the day I sold the above truck. I installed the dual filter system on the new truck, and took off to Alaska for the second time towing the Airstream trailer. I now have 63,00 miles on this truck with no problems. I still change oil and filters on the one time per year for oil and twice per year for filters. I am a very Happy AMSOIL Customer!!!

These are awesome filters. They allowed me to extend my drain intervals (using oil sample kit) to over 35,000 on my duramax diesel in my pick-up. The Lab kept telling me to go another 5000 miles after each test, once I got to this point, I decided I don't drive that many miles a year. I now just change oil before our long trip each year( towing firth wheel with a flatbed behind that.

I use these filters on all product at our home. Vehicles , lawnmower and even use it to filter the solution in my parts washer.

This was a great choice!!!!

Makes a huge difference in keeping your Diesel engines oil cleaner.

Need better packing I have a nick on the oil filter ring and I have pics of it new for the box thanks

Filter is great. Highly recommended By my mechanic

Easy to install and very happy with the results. Better filtration is a big deal to me!

Works very good .. Easy install

After 3500 miles on my F-350 dually 6.0 truck my oil still looks fairly clear and like I just changed it. Normally it would look black in a couple hundred miles. Filter works for sure.

Keeps oil clean

Added protection for Made In China, Cummins ISX. Helps reduce wear metals from circulating through engine. Does not reduce carbon/darkening of engine oil.

This filter backs up my the other engine oil filter I highly recommend anyone who runs a isx Cummins needs more oil filtration by far it's the best thing I have ever done to help my Motor

its a oil bypass filter. helps keep oil clean longer.

Was easy to install, however it does not seem to keep oil as clear as I expected. Maybe because I put it on a 7.3 diesel

Installed the bypass system on my 2105 F450 with the purpose of extending my oil changes from 7-10k miles to 12-15k. Prior to installation, I sent a base oil sample (w/ 3k miles) to be tested for comparison...can't wait to see the results. Ease of installation was a plus when deciding which system to use.