As always, this tuff really works, and I keep several bottles in the vehicle in case I am forced to use a lower octane fuel.

I’ll try it after new engine is broke in when I could get a little more use with it.

My old dodge with a tired old 318 is spinning wheels and pering like a kitten

Amsoil fan

I have a motor with 10:1 compression with a total advance of 35 degrees at 3000 rpm’s . The only problem I had was when I shut motor down it would diesel or run on with the first bottle of AMSOIL octane booster it has stopped Good stuff

I run 12.5 compression on a 448 cu NA hemi and 93 pump gas when I know there will be some real hard pulls I always add one bottle of octane boost to 10 gallons so far no knock no hemi tick no timing retard OBTW I also run Amsoil 60 weight !!

Our 1959 and 1964 Cadillac Fleetwoods need a little boost from 89 octane non-ethanol gas from Circle K. This gives the octane boost our cars were used to when they were built.

I own the last generation Audi V8 Biturbo engine. I don't trust octane ratings at the pump and use this product as protection.

2020 WRX stage 2 93 tune. Started adding a bottle of this to my tank at my tuners request (he runs it in his personal 2019 WRX) and it really made a noticeable difference in everyday driving. Engine is running smoother now, idle through whole rpm range, not getting any mis or really “hesitation” that it had been getting off straight 93 pump gas. AF learn was out of spec: +/- 18-20%: in half a tank running this product those numbers have dialed in and are staying under +/- 8% where they should. Highly recommend this product if you’re running a similar set up! I have noticed throttle response is more accurate, it feels like the car is running at its best, and the car just feels “happier,” I guess would be the best way to explain it.

I got the octane boost to give it a little bit more horsepower but I don't put that much into it. Cause I think it's just for racing so use it your own description

I use this in my 2012 Cadillac CTS-V, 6.2L, Supercharged Motor. Friday nights here are big for Street Racing. I'm a 64 y.o., gearhead, so when I pull up in the Caddy, I get some raised eyebrows. I always use, non-E-85, premium fuel and dump a bottle of the go-juice in the tank at the beginning of the evening. It is noticeable in the seat of the pants feel from the stock 556 h.p. LSA. We race everything from hopped up diesel trucks (yes, this IS Montana!), to 5.0 Mustangs to JDM projects. I'm not saying I beat the 'stangs all the time, but enough of the time to get some notice and respect.

-

Like the octane boost although the contents do not drain well norm the bottle. Something in the design of my truck gas filler port prevents the bottle from emptying. No doubt as an antisyphon mechanism.

I extract ethenol from gas and use this to replenish the octane. Works wonders and much better than 105 or any other brand!

This octane booster works as advertised. This is a great product.

Works like it says, just needs bottles compatible with capless fuel. 1st bottle got stuck so don't even try without funnel of some sort

This stuff works even better than expected in every vehicle that I use it in.

It is hard to find a higher octane fuel for my Screaming Eagle Harley This additive removes the cylinder ping and knock My Harley runs so smooth and efficient I believe in AMSOIL products

Takes the fuel to a whole level…

This octane booster plus 91 CA pump gas, my turbocharged engine comes alive with no trouble codes being set.