Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 20 Ounce (Pack of 6)

I've never had a lot of faith in fuel additives, usually dump them in, and forgot I did it, never noticing an improvement. Not the case with the Royal Purple Max-Clean additive. I had just changed the spark plugs in my 1987 Chevy El Camino with a 4.3L TBI engine. I took the vehicle for a drive, and it was fine until I stopped, and so did the engine. Quickly I restarted the engine, but it was idling rough, and the rpm was low. Once off idle it seemed fine. I thought possibly I had a vacuum hose come loose, so I rechecked and all was fine. I then thought maybe the EGR was sticking open at idle due to a piece of carbon, but there hadn't been a code set. I decided to try the easiest thing first, and added Royal Purple Max-clean to the fuel. In less than 100 miles I noticed the difference, and after a 150 mile trip it was running great, and idle was back to normal. Don't know for certain, it could have been one of the injectors was dirty, but all is back in order now. I would recommend this additive to others, it certainly worked for me.

Out of all the fuel cleaners on the market, Royal Purple is #1. It has the propor chemicals to work with today's bad fuel. Leaves no residue like the old faithful Staybil.

This has been working fantastic in my 05 Magnum. I use it every fill up. Increased fuel economy and better performance.

This smoothed out my motorcycle after years of being stored away

Don't work

Great product! I could really tell a difference in performance as well as fuel milage when I added this product to the tank. It arrived on time and was better than described. I would recommend and purchase this product again.

I've used this product for many years, in many vehicles. Although I've never scientifically proven this product works. I honestly feel like it works. Used every couple oil changes. Throttle and power responses you'll feel.

I have used Royal Purple MAX-Clean fuel system cleaner for several years and feel it is doing a great job on my direct injection vehicles. To use it you run your tank down towards empty, pour in the product and then gas up to say 15 or 20 gallons to get the right solution concentration and then drive your car for some distance. I time it to use the product before a trip and run the entire tank through. So far so good, my engine purrs!

Es el producto tal cual lo solicité, aunque tardo un poco en llegar, el Royal Purple Max Clean me satisface tenerlo, ahora a probarlo.

This is most likely the best fuel additive I have ever used as far as actual real-world improvement in fuel consumption. I have a 10 years old diesel vehicle which has been slowly increasing in fuel consumption, so I purchased this item. I added the content into the fuel tank when there was about 1/4 a tank left and let it run down until as far as I was willing (about 50km left in the tank). The next fill up, I did not notice a very noticeable change, but from the next tank on, I have been getting 50-70km more out of each tank of fuel. For reference, my tank is 65L and I've been getting about 740km out of a tank. I generally do a lot of hilly 60km/h drive (50%). a little bit of town driving (probably about 20%) and a little bit of highway (20-30%). Now, after the treatment, using the same fuel, same driving pattern, I am getting approximately 800km out of a tank on average. I think I might buy another one and treat it again. It'll probably clean the system further and give me better results.

WAY TO COSTLY TO USE AS A MAINTANCE PROGRAM BUT GOOD PRODUCT

息つぎが改善され吹け上がりが良くなった。 アイドリングが少し安定してる。 キャブ車におすすめです♪

Perfect! works very well