Johnsen's 4688 Octane Booster - 12 oz.

I used this product In lieu of having to pay premium gas prices and just getting by with paying for mid grade. Our car is an infiniti 2015 Q40. And it started riding a little rough since moving to mid grade without getting a booster. So in order to be able to still have the car running with high performance but not paying for the price we started getting boosters. Did this a good job in allowing the car to still perform in high quality but not having to pay the price of premium gas. Good buy.

Works good in stored gas to keep fresh, but must use exon premium

Works great

I got this for my snowmobile which was knocking. The Skidoo is essential as we have to snowmobile to our car. It also seems to keep my generator running longer on a tank of gas. I've also used it for my chainsaw. My car is not high-performance so I don't use it there.

It shouldn't take much to run my Porsche but the manual says 93 octane and I can only buy 91 octane at the pump. So I use this. Does it improve performance? Yes. Not dramatically but I notice a smoothness and quietness when mixing the booster with my gas.

I received the product and it contains as stated in the description. No issues

I needed 2 containers for 25 gallons and still didn't work as well as mid grade gas. No economical at all!

Great item