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Octane boosters in general.

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Old May 29, 2025 | 01:22 PM
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Default Octane boosters in general.

Anyone see or use Holleys ”new” octane booter that claim 5 point gains on 20 gallons with one 16oz bottle? Or see any tests run?

MSDS says distallates and MMT is all thats in it.

Wondering if its an advertising gimmick like they use to use. When they state it raises “5 points” do they mean it takes your 91 octane and makes it 91.05 OR maybe 91.5 octane? Or do we think its a semi legit 96 octane possible?

any other better octane boosters peopel are using? Reason I ask is I run a supercharged wave runner on pump gas. They suggest 93 minimum and all we have is 91. Wouldn’t mind 95-96 for peace of mind. But I don’t want snake oil BS at $14 a can.
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Old May 29, 2025 | 01:31 PM
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Every time I've ever read the cans on any of that stuff it always takes three or four cans for a full tank to be effective.
The "5 numbers" part is a red flag to me, why be vague, just say how much it increases octane for 20 gallons and be done with it.
So, if I have a 16-gallon tank, will it increase it by 6 numbers???
Seems fishy to me.....
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Old May 29, 2025 | 01:50 PM
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Each point is a tenth an octane; 5 points is .5 increase.

use VP racing octane booster, it’s good for 80 points which is 8 octane. I wouldnt use any other brand.

Im sure you read about people mixing acetone and paint thinner for extra high octane booster.
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Old May 29, 2025 | 01:53 PM
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The industry "standard" approach is to claim x number of "points" increase, where points means .x increase. This means they are claiming 91 would become 91.5. Absolute best case scenario is that you get a half number octane increase. And that is IF you believe the claim, which may or may not refer to research octane rating only. Probably better off just dumping in some toluene, xylene, or acetone for the prices most of the octane boost junk sells for.
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Old May 29, 2025 | 02:17 PM
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I use VP Unleaded Octane Booster and engine feels stronger and smoother in my 12:1 compression LS3. Kinda pricey at $29 with tax for use with up to 10 gallons, but e85 station is like 25 miles away and I prefer the VP.

I also use VP Cool Down to bring temps down about 20 degrees.

E85 raises octane boost and cools, so I try to replicate some of that with VP Octane Booster and VP Cool Down in South Texas Heat.
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Old May 29, 2025 | 02:18 PM
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Appreciate the input. The VP stuff is $30 a QT claims the same “up to 8 numbers” or 80 points. So 91 to 91.8? Then in the fine print it states 32oz for 10 gallons gives you “7 numbers”. So I’d need $60 worth to get .7 octane in 20 gal?

Couple gallons of xylene or toluene bumps octane quite a bit more and costs less. Race gas mixing still sounds like the best bang for the buck.

I installed 4gph worth of straight meth inj last year, I'm sure it will be ok. Was just curious when I saw that “new” octane booster pop up on my Holley news feed. At $13 a bottle id give it a go if it bumped octane decently.

I use e85 on my cars and love it. But ethanol and watercraft generally don't mix well and I didn't want to redo the entire fuel system on the waverunner.

This stuff has some pretty wild claims... They say to raise 20 gallons of 91 to 93 it only takes takes 2.6oz 5.2oz to make 95

https://boostane.com/products/boosta...octane-booster

Last edited by Forcefed86; May 29, 2025 at 02:27 PM.
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Old May 29, 2025 | 02:32 PM
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Originally Posted by Forcefed86
Appreciate the input. The VP stuff is $30 a QT claims the same “up to 8 numbers” or 80 points. So 91 to 91.8? Then in the fine print it states 32oz for 10 gallons gives you “7 numbers”. So I’d need $60 worth to get .7 octane in 20 gal?

Couple gallons of xylene or toluene bumps octane quite a bit more and costs less. Race gas mixing still sounds like the best bang for the buck.

I installed 4gph worth of straight meth inj last year, I'm sure it will be ok. Was just curious when I saw that “new” octane booster pop up on my Holley news feed. At $13 a bottle id give it a go if it bumped octane decently.

I use e85 on my cars and love it. But ethanol and watercraft generally don't mix well and I didn't want to redo the entire fuel system on the waverunner.

This stuff has some pretty wild claims... They say to raise 20 gallons of 91 to 93 it only takes takes 2.6oz 5.2oz to make 95

https://boostane.com/products/boosta...octane-booster
not quite.

80 points 8 octane. 91 octane becomes 99 octane. 93 becomes 101 octane.
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Old May 29, 2025 | 02:41 PM
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Why isn't that listed then? They have the same wording. "8 numbers". (though they say 7 numbers in the small print). Which would be 70 points? So are the Holley claims of 5 numbers not 50 points or 5 octane? Seems super vague.

If you look at the Boostane site they claim legit full points with no BS wording. They provide calculators to target up to 116 true octane. They also state they have 3rd party testing all over the site that backs up their claims. I don't see any when I look online though. In my case it would be like $4 a fill up to turn 91 into 95. And I'd get 8 fill ups on $32 a bottle. Great price... if it's not bs.
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Old May 29, 2025 | 03:04 PM
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I was recommended to use Boostane if I wanted added security for my engine. They have a calculator on their website on how much to use.

''TO TRANSFORM 20 GALLONS OF 93 TO 96 OCTANE, ADD 4.8 OUNCES OF BOOSTANE PREMIUM INTO THE TANK. YOU’LL NEED AT LEAST 1 BOTTLE(S)''
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Old May 29, 2025 | 03:36 PM
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In theory the Boostane should work fine, as MMT is a known octane rating booster that has been used in pump fuel. However, I would be concerned about hoping that dumping a concentrated mix in my tank would mix evenly. Their website even mentions that if the MMT falls out of suspension (because it does NOT dissolve), it can clog filters and injectors.
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Old May 29, 2025 | 03:48 PM
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They discuss that a bit here. Boostane guy seems pretty confident clumping/clogging isn't an issue with their product at least. OF course he does work for them so who knows.

https://www.corvetteforum.com/forums...oostane-3.html
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Old May 29, 2025 | 03:57 PM
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I had a bad experience with octane boosters...

I believe it was even VP brand, but it was in 2008 so I may be misremembering.

What I do remember is I had a 408 11.4 to 1 compression that ran fine on pump 91. When I would run it on nitrous, I would add the octane booster. It left all kinds of redish rust color deposits all over the plugs. It made it impossible to read the plugs correctly. I've always used plug reading for tuning. I currently don't even have knock sensors in my current combo although I did have them in the previously mentioned 408.

That car was my daily as it was the only car I owned at the time. I drove it for 3-4 years with that motor and sprayed 2 full mother bottles of nitrous through it over the last couple years I owned it. I had my own filling station for nitrous. Eventually I hurt a piston and had to rebuild the motor. It wasn't too costly as it only hurt the one cylinder #1 not # 7 like most would suspect. It only needed a .010 over bore, one new valve in the AFR heads and a little cleanup of the chamber on that hole.

My thoughts or excuse is that I couldn't accurately read the plugs with the deposits left by the octane booster or "maybe" I would have noticed something was up with that hole before it got hurt.

I did drag race the car 2-3 weekends a month visiting 4 different tracks over the couple years I was on nitrous. Car ran 10.2 in 2007 and 2008 consistently in all temps and was literally dominant on street nights or street races over that time, but it is Iowa, so we are a bunch of dumb rednecks and times were much different back then as far as street racing went.

ETA: I actually think it was Torco brand octane boost the more I think about it.
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Old May 29, 2025 | 05:33 PM
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Ive used Boostane. It works. My 11:1 LS car sat for a year and I guess all the octane in the 92 fuel evaporated. It rattled like mad. One can of boostane and all was fixed.
It does make your plugs orange though.
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Old May 29, 2025 | 05:40 PM
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Sherwin Williams paint store: 5 Gallons of Toluene, @ 115 Octane- Mix as required.

20 Gallons Unleaded x 90 Octane = 1800 units
5 Gallons Toluene x 115 Octane = 575 units
1800+575 = 2375 total units
2375 (octane x gallon) / 25 Gallons = 95 Octane "Blend"
.
.
In my experience with high compression SPARK motors Little Bottles of snake oil do jack plus ****, plus a bit of color on the spark plugs.
You want OCTANE it takes high OCTANE fuel. Alcohol, Toluene, Acetone, Xylene all work well but you need GALLONS not 16 ounce bottles.

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Old May 29, 2025 | 06:51 PM
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Originally Posted by Full Power
Sherwin Williams paint store: 5 Gallons of Toluene, @ 115 Octane- Mix as required.

20 Gallons Unleaded x 90 Octane = 1800 units
5 Gallons Toluene x 115 Octane = 575 units
1800+575 = 2375 total units
2375 (octane x gallon) / 25 Gallons = 95 Octane "Blend"
.
.
In my experience with high compression SPARK motors Little Bottles of snake oil do jack plus ****, plus a bit of color on the spark plugs.
You want OCTANE it takes high OCTANE fuel. Alcohol, Toluene, Acetone, Xylene all work well but you need GALLONS not 16 ounce bottles.
I've used toluene/xylene before with great results. I did that until I got the fuel system to support ethanol.
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Old May 30, 2025 | 10:35 AM
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Yea I used toluene/xylene over the years too but its crazy expensive here at $25 a gallon. Sherman Williams wouldn't' sell me 5 gallons either without a contractors license. I guess I look too much like Walter White. Cheapest I've found 5 gallon pails is $180ish. Cheaper to buy it by the gallon. Makes no sense.

If this Boostane stuff will really take me to 95 octane for about $4-5 per 16 gallons then it sure seems like a deal.
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Old May 30, 2025 | 01:12 PM
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If it sounds to good to be true it usually is.
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Old May 30, 2025 | 01:53 PM
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Originally Posted by Forcefed86
Yea I used toluene/xylene over the years too but its crazy expensive here at $25 a gallon. Sherman Williams wouldn't' sell me 5 gallons either without a contractors license. I guess I look too much like Walter White. Cheapest I've found 5 gallon pails is $180ish. Cheaper to buy it by the gallon. Makes no sense.

If this Boostane stuff will really take me to 95 octane for about $4-5 per 16 gallons then it sure seems like a deal.
If you can run open loop AVgas would likely be the cheapest option. Of course that would destroy any o2 sensors in no time.
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Old May 30, 2025 | 02:17 PM
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IMO (maybe worthless hah)
If I couldn't run pump gas on my street car, I am doing something wrong.
I can't imagine having to do crazy stuff to my fuel just to drive my car. At that point, is it really worth it?
Now if it is strictly a race car, then sure, go for it, makes more sense. But if I simply wanted to regularly drive my toy car, I wouldn't want something I can't fuel up at my local gas station.
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Old May 30, 2025 | 02:56 PM
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Originally Posted by SparkyJJO
IMO (maybe worthless hah)
If I couldn't run pump gas on my street car, I am doing something wrong.
I can't imagine having to do crazy stuff to my fuel just to drive my car. At that point, is it really worth it?
Now if it is strictly a race car, then sure, go for it, makes more sense. But if I simply wanted to regularly drive my toy car, I wouldn't want something I can't fuel up at my local gas station.
Maybe you skipped over the part where this thread is about a modified supercharged jet ski?
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