Royal PurpleMax Boost Octane Booster - 16 oz.

This product provided a noticeable improvement in low end torque in a turbocharged 4 cylinder. I did not notice a significant difference on the top of the rev range. It was worth using when it is very hot and humid in Florida.

I have used Royal Purple products for many years, the formulation of all their products, from break-in oil to heavy duty gear lube has helped all the vehicles I keep up the maintenance on perform top notch, last longer, save my family a good bit of $$$$$$- I started using their "Max-Boost Octane Booster" when I had a brand new GMC 7.4 Lt. (454 ci.) crate engine installed in my 1994 K-2500, after using the break-in oil 3 changes in 5,000 miles, I had ordered 9.5 to 1 compression pistons for my new engine and knew I would need high octane fuel to allow the beast to run at it's best. With a 4:10 gear ratio I was not expecting more than 10-12 mpg.- after 21,000 miles (using R.P. fuel system treatment & Max-Boost) I get 14-15.5 on the Hwy. (if I keep it under 70 Mph) With a manual 5 speed (NV4500) even at 75-80 Mph. I get 12.5-13 Mpg. I'm a bit excessive when it comes to my truck, as I'm disabled and 84 miles from the Dr. office and 75 miles from the nearest Wal-Mart- N.E. Wyoming winters can be brutal, summer can see temps. near 100- long story short, from -40 to +100 this octane booster is the very best (I use no ethanol fuel) 91 octane fuel and R.P. keeps my outfit purring like a tiger- Thanks Amazon and much thanks Royal Purple for all the fluids in my GMC and my 77 yr. young mother's 2005 Toyota Tundra

Okay here is what u need to understand most cheaper octane booster claim to raise 3-8 points thant is on .3-.8 octane. This product raises it 3 full numbers so 91 octane would be 94 octane. What is not clear and i cant find a chart is how many gallons it does that with it says up to 25 gallons but i assume it is very similar to torco and torcos top claimed rating is with 5 gallons. Torco also comes in a 32oz can vs this being 16oz. I am sure it is either 5 orTen gallons of gas and u get 3 full numbers. I mixed a full can with 10 gallons in my 2010 Z1 Turbo snowmobiles with a 4 stage tune. When i go to stage 2 with 91 octane i get a onow light at higer throttle. With this one can mixed with 10 galoons it only came up once all day so that is a huge improvement! Race fuel is way too expensive to but and race fuel is nothing more than normal gasoline with additives just like 93 octane premium is at the pump. I need 91 octane because it has bot ethonal. This product as with torco contains mmt which is a know octan booster. This product is legit but i would not have more than 10 gallons in the tank when u mix it or use 2 cans. Also u add when empty then add gas to mix it up. Torco is still a but better ounce for ounce but this is a very close second and a few buck cheaper. It also fits in my rear bag on my sled so i can add it at gas stops at on the trails.

I like to use this ever now and then and it seems to work. I can always tell after I use it

Great price and does the job of cleaning your whole fuel injection system.

I live in NorCal and only get up to 91 octane. I have tried several other brands' octane boosters in my E450 twin turbo 3.0L V6 with only minor improvement. This stuff works! I enjoy driving in Sport+ now as it's much more responsive and my mileage has improved noticeably. I will be getting a case of this now.

Great stuff! I used this with my 2016 M4 GTS and it is flawless. I put this in when my gas was running low and then I filled up my tank so everything can mix in. To be honest I was skeptical at first but it did give me a noticeable performance boost. A bit of background, I was staying in California during the time of testing and the only available gas there is 91 octane instead of the recommended 93 needed for my car. Yes it is not that big of a difference you may think, but my tests show otherwise. I will dyno the car later on to prove my word. The car sounds much more aggressive and burbles more, the engine just sounds much happier when this in the tank. I also tried it with my 2013 Honda Accord in which it didn’t have a noticeable difference. As for MPG, it does not make any difference whatsoever, at least for my cars. I’d highly recommend this for cars which have higher compression ratios that can benefit from high octane. 10/10 in my book, I use this every fill up, got one in my trunk at all times.

all fine