11722-2PK Max-Clean Fuel System Cleaner and Stabilizer - 20 oz. Bottle, (Pack of 2) by Royal Purple

One can of this every 10,000 miles in an almost empty tank, prior to filling, keeps your acceleration and fuel mileage like new - contains P.E.A. which breaks up and removes carbon fouling without clogging your fuel filter and is the best price point for quality product. Seller shipped accurately and on time.

One of the better fuel additives that actually works! Granted I’m a Royal Purple fan for years now and use their oil as well. This additive does increase efficiency thus mileage slightly so that’s a win!

Best gas additive I have tried (and I have tried many). Restored mileage after one treatment. Will continue to use.

I've been trying to run this stuff more frequently through vehicles. I really think it does have some good cleaning qualities. Definitely not hurting anything.

Read good stuff about product. Easy instructions. Fill tank then poor in.

Could tell a difference right away using the royal purple injection cleaners! Would definitely purchase again if needed!

So far seems to help the engine and fuel economy, will know more soon!

I bought a total of six of these. and I have 157xxx miles on my car. And I can feel the difference in the mpg and acceleration.