Yamaha Yamalube Outboard Ring Free Plus Fuel Additive- 12 Ounce, #ACC-RNGFR-PL-12

Been using for years. Great product

The best engine combustion decarbonizer! I used Yamahas ring free on a 2014 Subaru Outback with a 2.5 that started consuming oil. Then I realized this oil consumption was causing my engine to have a slight ping around 2000-3000 RPMs. I learned that oil burning carbonized my combustion chamber hence caused carbon to make my engine ping. My car had the ping for about 3 years and it was getting worst. I tried Sea foam and Chevron Techron and they both helped and they are good products but the pinging was still there. Yamaha Ring free has for the first time gotten rid of my pinging problem. I did use it as shock treatment though which requires you to add 2 oz per gallon of gas in your gas tank. It goes in your gas tank so it also cleans injectors. Which would explain why my engine is running so smooth. On top of my engine smooth it has regained new power. Very happy with product. Thanks!

Used on Acura RSX Type S with caked carbon deposits on top of the pistons (not used on a boat). Used one bottle in gas tank (doing the intense procedure version) & it completely cleaned off the top of my pistons. I have never gotten carbon this caked completely removed; not even multiple B12 piston soaks have worked this well. This needs to be an Amazon Prime product!!! Confirmed using bore scope & no more oil burning from the K20z1.

Must have for your Yamaha outboard. Cleans injectors and smooths out rough idle

Didn’t notice any change in performance after a year of using this. There are half price Techron products out there that offer similar results.

I always put a capful for each 5 gallons of gas. Highly recommend by my local Yamaha dealer. I’ve got a 2007 150 hp. It runs great.

Essential for mottors

Fast shipping and great product.