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octane in fuel

Old 08-25-2003, 04:21 PM
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Default octane in fuel

At my local petrol station i can get several differant fuels.

i can get standard unleaded at 95 ron
i can get super unleaded at 98 ron
and shell optimax at over 99 ron

which is the best fuel to run on a turboed B16?
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Old 08-25-2003, 06:40 PM
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Default Re:octane in fuel

The higher the octane the better.This will help prevent detonnation since high octane gas is less likely to pre-ignite.99 octane?Where do you live?
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Old 08-25-2003, 07:25 PM
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Default Re:octane in fuel

England
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Old 08-26-2003, 08:33 AM
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Default Re:octane in fuel

95 is higher then I can get at ANY pump station.

starts at 87 then 89, 91, 94.

Canada.
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Old 08-30-2003, 04:24 PM
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zac
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Default Re:octane in fuel

Originally Posted by crx88Si
95 is higher then I can get at ANY pump station.

starts at 87 then 89, 91, 94.

Canada.
He's referring to RON (research octane number) which is not the same as our (US+Canada) pump octane numbers. US/Canada pump octane is (RON+MON)/2.

91 RON = 87 pump
96 RON = 91 pump
99 RON = about 93-94 pump.
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Old 08-31-2003, 04:25 PM
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Default Re:octane in fuel

add toulene

Formula #1 - Toluene
R+M/2.........114
Cost...........$2.50/gal
Mixtures with 92 Octane Premium
10%...........94.2 Octane
20%...........96.4 Octane
30%...........98.6 Octane
Notes: Common ingredient in Octane Boosters in a can. 12-16 ounces will only raise octane 2-3 *points*, i.e. from 92 to 92.3. Often costs $3-5 for 12-16 ounces, when it can be purchased for less than $3/gal at chemical supply houses or paint stores.

Formula #2 - Xylene
R+M/2.........117
Cost...........$2.75/gal
Mixtures with 92 Octane Premium
10%...........94.5 Octane
20%...........97.0 Octane
30%...........99.5 Octane
Notes: Similar to Toluene. 12-16 ounces will only raise octane 2-3 *points*, i.e. from 92 to 92.3. Usually mixed with Toluene and advertised as *race formula*.

Formula #3 - Methyl-tertiary-butyl-ether (MTBE)
R+M/2.........118
Cost...........$3.50/gal
Mixtures with 92 Octane Premium
10%...........94.6 Octane
20%...........97.2 Octane
30%...........99.8 Octane
Notes: Oxygenate. Very common in octane booster products. Has lower BTU content than toluene or xylene, but oxygenate effect makes the gasoline burn better and produce more energy.

Formula #4 - Methanol or Ethanol
R+M/2.........101
Cost...........$0.60 - $1.75/gal
Mixtures with 92 Octane Premium
10%...........94.3 Octane (Methanol)
10%...........94.7 Octane (Ethanol)
20%...........Not Recommended
Notes: Methanol is wood alcohol. Ethanol is grain alcohol and found in Gasohol in 10% ratios. Both alcohols are mildly corrosive and will eat gas tank linings, rubber and aluminum if used in excessive ratios. Main ingredient in "Gas Dryers", combine with water.

Formula #5 - Isopropyl Alcohol and Tertiary Butyl Alcohol
R+M/2.........101
Cost...........$0.60-$1.50/gal
Mixtures with 92 Octane Premium
10%...........94.5 Octane
20%...........Not Recommended
30%...........Not Recommended

Notes: Similar to Methanol/Ethanol. Isopropyl Alcohol is simply rubbing alcohol.

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Old 08-31-2003, 05:45 PM
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Default Re:octane in fuel

Originally Posted by crx88Si
95 is higher then I can get at ANY pump station.

starts at 87 then 89, 91, 94.

Canada.

Were in Canada do you live? I'm in Ontario and the best in my area is 91. And then there is 114 race fuel but I think that is out of my league.

Larry
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Old 08-31-2003, 05:51 PM
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Default Re:octane in fuel

Originally Posted by shortyz
add toulene

Formula #1 - Toluene
R+M/2.........114
Cost...........$2.50/gal
Mixtures with 92 Octane Premium
10%...........94.2 Octane
20%...........96.4 Octane
30%...........98.6 Octane
Notes: Common ingredient in Octane Boosters in a can. 12-16 ounces will only raise octane 2-3 *points*, i.e. from 92 to 92.3. Often costs $3-5 for 12-16 ounces, when it can be purchased for less than $3/gal at chemical supply houses or paint stores.


yo shortyz, or anybody else, HAVE YOU PERSONALLY ADDED TOULENE TO BUMP UP YOUR OCTANE? ive been considering doing this, but i am not sure cuz sometimes info on the net is just bullshit. if anybody has PERSONALLY tried this(not "yeah i heard from some dude that knows somebody online...", please let me know. IS THIS REALLY SAFE in the long run for your fuel lines and motor? LEMME KNOW GUYS, i have been considering this for a while now.
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Old 09-01-2003, 01:46 PM
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Default Re:octane in fuel

yep its safe. toulene is the main ingredient in the gasoline to create octane..

alot of snowmobilers use toulene to get 100 octane without it being leaded..

its safe dont worry. but just dont mix it wrong.. only 30% no more.
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Old 09-01-2003, 08:20 PM
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Default Re:octane in fuel

Just remember that those percentages given by Shortyz are by volume.So if you have a 10 gallon tank to get 94octane you have to first only have 9 gallons of gas in it or the toulene wont fit But to 9 gallons of gas to be 94 octane you would ad 9 tehths of 1 gallon of toulene.

So my point is that the % is of the volume of gas in your gas tank.
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