octane booster

[FMP]

http://vanilla47.com/PDFs/Toluene/BE...0octane%29.pdf

Toluene

[Steelborn]

On what motors you using toluene?
Are you doing it because of no 91 or higher avaliable?
if something happens to new motors under warranty and Mercury finds out that I was running 87 I can kiss warranty good by...
I'm not rich enough to gamble with $40k.

For this setup i would suggest Toluene. You can pick up a gallon at most ACE Hardware Stores. If you can get them to sell it in bulk it will get cheaper. Toluene does not raise the octaine much but it stops detonation. I use 1/2 gallon to 15 gallons of gas, you can use more if needed. You can check out how it works by putting it in a newer car that is computer controlled. The computer sets the timing by the knock censor located on the block. My S10 would smoke the tires when I added it to my tank. Refineries use this for a base fuel to do their octaine test. F1 use to use this as fuel back when the first generation of turbo engines were used back in the day.

[FMP]

So why run 87? Use 91 no alc and raise it with toluene. Don't use hardware grade , get it in 5 or 6 gallon pails from a chem supplier to insure quality. The link above has the mix correct by %.

[sleekcrafter]

Have not tried this stuff yet, My friend raves about this, buys it by the case..

https://boostane.com/octane-boosters...tane-boosters/

[rude tim]

On what motors you using toluene?
Are you doing it because of no 91 or higher avaliable?
if something happens to new motors under warranty and Mercury finds out that I was running 87 I can kiss warranty good by...
I'm not rich enough to gamble with $40k.

I have used it on a 389hp V6 Evenrude and my 428hp V8 Evenrude on my deck boat. On the V6 I used it when the race gas set in the tank for over a couple of weeks and I use it on the deck boat for the same thing but it runs on 91.
What I was suggesting is if you can not get 91 run it with the 87. Or you can add it to the 91 if it sits a while.

[Mark75H]

For this setup i would suggest Toluene. You can pick up a gallon at most ACE Hardware Stores. If you can get them to sell it in bulk it will get cheaper. Toluene does not raise the octaine much but it stops detonation. I use 1/2 gallon to 15 gallons of gas, you can use more if needed. You can check out how it works by putting it in a newer car that is computer controlled. The computer sets the timing by the knock censor located on the block. My S10 would smoke the tires when I added it to my tank. Refineries use this for a base fuel to do their octaine test. F1 use to use this as fuel back when the first generation of turbo engines were used back in the day.

If you research it, you will find that toluene is NOT used as a reference fuel for knock testing.

Increasing resistance to detonation knock is, by definition, increasing octane.

Toluene is a good high octane base and good additive in high ratios. Its one of the components that makes 100LL meet the specs for AV gas.

Toluene is also used for meth fabrication and you'll have to show ID and do paperwork to buy any bulk.

[FMP]

If you research it, you will find that toluene is NOT used as a reference fuel for knock testing.

Increasing resistance to detonation knock is, by definition, increasing octane.

Toluene is a good high octane base and good additive in high ratios. Its one of the components that makes 100LL meet the specs for AV gas.

Toluene is also used for meth fabrication and you'll have to show ID and do paperwork to buy any bulk.

YIKES, can't even have some fun mixing up some decent fuel without getting the eye , sad world.

[dwilfong]

I have no problem getting 5 gal pails of Nitro shipped right to my front door by UPS...................
SO I don't think thy will blink a eye at Lowes when you buy a few 5 gal pails of Toluene.......LOL

[rude tim]

If you research it, you will find that toluene is NOT used as a reference fuel for knock testing.

Increasing resistance to detonation knock is, by definition, increasing octane.

Toluene is a good high octane base and good additive in high ratios. Its one of the components that makes 100LL meet the specs for AV gas.

Toluene is also used for meth fabrication and you'll have to show ID and do paperwork to buy any bulk.

I beg to differ. I worked in sothern California Refineries for 33 years, i have even rebuilt the knock engines they use to test octane with at Conoco Wilmington.

[Mark75H]

Pretty sure you aren't going to get a 100 reading from a 114 fuel are you?

Probably much less expensive than dead on 100 iso-octane, but if the calibration run included toluene at its correct reading, iso-octane at its correct reading and something lower at its correct reading that would be more accurate and scientific than just straight out testing at 100.

In briefly talking with the MD state tech that runs the tests at the Comptroller's lab here, he only mentioned calibrating at 100 with iso-octane and how it just plain became a boring day to day job.

[MattGreen]

Sam and Tim: you're both correct. Iso-octane and toluene (and of course n-heptane) are all used as reference fuels on RON and MON engines. Ratios of each can be used as calibration standards. As mentioned, octane testing it is an annoying, boring job nobody likes ;( (the knocking, although not super loud, is very annoying). I've spent a lot of time in multiple refinery QA labs but thankfully did not do these tests.

Matt

Pretty sure you aren't going to get a 100 reading from a 114 fuel are you?

Probably much less expensive than dead on 100 iso-octane, but if the calibration run included toluene at its correct reading, iso-octane at its correct reading and something lower at its correct reading that would be more accurate and scientific than just straight out testing at 100.

In briefly talking with the MD state tech that runs the tests at the Comptroller's lab here, he only mentioned calibrating at 100 with iso-octane and how it just plain became a boring day to day job.

[Steelborn]

Ok so I found out that they started pouring 95 RON on the island were the boat will be stationed, I contacted Mercury and their respond was that minimum 96 RON has to be used on 300XS motors or they will void the warranty, there's no such a thing as 96 RON, so it's either 95 RON or 98 RON.
95 RON is iqualent to 91 US octane so I don't know why Mercury saying 96 RON.

Im really trying hard to stay with 300XS's, other option 300 verados is the way I least want to go...

[Mark75H]

Ok so I found out that they started pouring 95 RON on the island were the boat will be stationed, I contacted Mercury and their respond was that minimum 96 RON has to be used on 300XS motors or they will void the warranty, there's no such a thing as 96 RON, so it's either 95 RON or 98 RON.
95 RON is iqualent to 91 US octane so I don't know why Mercury saying 96 RON.

Im really trying hard to stay with 300XS's, other option 300 verados is the way I least want to go...

They are saying that because they want you to run 98

[Steelborn]

Thats obvious, but what's the reason, are 1 octane will make that much difference to make motors knock?

They are saying that because they want you to run 98

[V-bottom]

Thats obvious, but what's the reason, are 1 octane will make that much difference to make motors knock?

what is the +/- percentage factor with the retail gas octane? When you purchase 91 octane at the gas station can it vary between 90 -91 or does it have to be minimum 91? I only use a little octane booster with each fill up when i purchase 91 octane just to be safe that I am 91+. If I can find 93 octane or better I don't bother adding any to the tank.