What Octane do you use for P11?

[fuzzynaval]

I searched all through the forums...all I could come up with is what octane for a p10.

I have been hearing mixed answers. Few friends who work at a car shop told me 89-91 for gas. I have a friend who says...87 is all you need...anything more is just a waste.

So what do you guys use? and have you seen a difference in the octane for your cars.

[jprimera]

if you have set your timing at 17+ use 92 oct,here is a link with very good information about gasoline.
http://www.landsfield.com-faqs/autos...ine-faq/part1/
hope this help.

[fuzzynaval]

link is broken...and haven't done anything to the car....still brand new...still stock.

[DCastillo]

in chile, the octane is as high as 97

[primera man]

Use either 91 or 96 here in NZ

[howard_w13]

Originally posted by fuzzynaval
I searched all through the forums...all I could come up with is what octane for a p10.

I have been hearing mixed answers. Few friends who work at a car shop told me 89-91 for gas. I have a friend who says...87 is all you need...anything more is just a waste.

So what do you guys use? and have you seen a difference in the octane for your cars.

The only time a higher octane will make any difference is when you make major modifications (Ex:adjust timing, cams, turbo, etc.) to your engine. If your engine is stock, the only difference you'll is in your wallet.

[Nismoboy1]

all your octane questions answered:

CLICK HERE



i'd just stick with 87

[jprimera]

DCastillo owr oct 97 is the same usa 92 ,by the way the ipf 97 is actualy 98,6 oc ,just for the record.

[kris]

Just make your own high octane fuel

I would NOT suggest that a person use the following fuel mixtures without considering the detrimental effects on your engine, vital engine components (O2 sensor, etc), and other potential damage. That said, the information is interesting.
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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.

Sample Mixture
To make your own octane booster, it is easiest to make up a large batch, and then bottle it up in "dosage-size" uses.
Below is the basic formula of one of the popular octane booster products. To make eight 16 ounce bottles (128 oz = 1 gal):

100 oz of toluene for octane boost
25 oz of mineral spirits (cleaning agent)
3 oz of transmission fluid (lubricating agent)
This product is advertised as "octane booster with cleaning agent *and* lubricating agent!". Diesel fuel or kerosene can be substituted for mineral spirits and light turbine oil can be substituted for transmission fluid. Color can be added with petroleum dyes.


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[DCastillo]

we have a mad scientist on our hands!

[howard_w13]

Speaking of octane, any of you guys use those octane boosters? I'm just curious to know how(or if)it works.

[DCastillo]

its doubtful

[jprimera]

This octane boosters works weel in a heavy modified n/a motors or turbo

[DCastillo]

ditto

[fuzzynaval]

Originally posted by howard_w13


The only time a higher octane will make any difference is when you make major modifications (Ex:adjust timing, cams, turbo, etc.) to your engine. If your engine is stock, the only difference you'll is in your wallet.

well I got 40 more miles out of a tank with 89 compared to 87/ 89-91 is about the same. so does that mean I shouldn't go below 89?