Schaeffer Manufacturing Co. 0131-021S Neutra Fuel Stabilizer, 12 oz. Bottle

This was recommended to me and I decided to give it a try. I drive 2017 Chevy car, it recently hit over 100,000 miles and the engine started knocking and having issues with maintaining rpms. Gave this a go and wow, works amazing, could notice a difference in smoothness in driving after the first day. Finished that round and did another, now she's working like I just drove her off the lot. Smooth, quiet, I got my car back! Will recommend and buy in the future!!

1oz per quart for engine oil. Works amazing to keep your engine clean.

Liked very much will order again

I had John Deere 425 garden tractor with a liquid cooled Kawasaki V-Twin carburetor 20 HP engine that had some issues running on full throttle without having to have the choke open slightly. I suspected that one of the jets in the carburetor was partially plugged.I added about an ounce to a couple of gallons of fresh ethanol free fuel, and within 20 minutes, it was running significantly better.

This is for 1 bottle of the additive, not 4 bottles like the listing says but I can't return because Amazon doesn't accept returns for fuel additives.

I have used multiple products like this on all of my vehicles in the past. My truck is a 2003 GMC Sierra 1500 HD Crew Cab with a 6.0 engine. I have not got through one full tank yet but I can see an increase in fuel economy already. I also put it in our 2018 Honda Accord Sport and a 2012 Toyota Camry but haven’t noticed any significant fuel economy in either of those yet. I ordered a couple more bottles and plan on putting one more in my truck on the next fill up and then also trying it in my sons 2021 Honda Civic Sport.

LIKE- Product adds zip to my VW Jetta SE.It is a pour in the tank additive used to help keep fuel system clean.NEEDS LONGER SPOUT.DISLIKES- The weak glue and foil seal that deteriorate from the product vapors and allows leakage. The packager, unfortunately for me, laid the bottles down in the box without an absorbency matte or sealed plastic wrap.Upright may have helped to minimize the leakage. This is nothing new with this product in the past 3 years, to me. Schaeffer oil needs a more durable seal for this product too. When the seal leaks, the product is older sitting on shelf.I placed box on my stowaway leather ottoman overnight and it now has the smell of this product. Later delivery, didn't make it to the garage until morning.Amazon-how about a couple of sealed bottles and some free leather cleaner?

This stuff is excellent for an engine flush, works well as a fuel injector cleager (mainly bought it for flushing my engine) cleaned my engine to near new, when I changed the oil it was a thick metallic black so I seen firsthand that it works as it should. Highly recommend!