What Octane do you use for P11?

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.

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

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

in chile, the octane is as high as 97

Use either 91 or 96 here in NZ

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.

:cool: :cool:

all your octane questions answered:

CLICK HERE (http://carpoint.msn.com/advice/news_4020119_12.asp)

:D

i'd just stick with 87 :cool:

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

Just make your own high octane fuel :D

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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we have a mad scientist on our hands!

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

:cool: :cool:

its doubtful

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

ditto

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.

:cool: :cool:

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?

if you have the timing advance ,you should go with 91 otherwaise use 87 or 89.

If your engine is stock, the only difference you'll is in your wallet.
fuzzynaval is raight

I just use 91. Only the best for my baby.

Originally posted by fuzzynaval


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?

Oh no, not saying that you shouldn't go below 89, but I'm just wondering if the 2-3 mpg increase in gas mileage is worth the extra 10-20 cents/gal I'd spend on plus or premium. Heck, for the last couple of weeks, 87 octane has been only $0.95/gal here in San Antonio. BTW, do you have any modifications to your engine? All I have is the Stillen intake and that's it(for now).

:cool: :cool:

Does anyone know what the conversion is from US Octane ratings to New Zealand Octane Ratings. I understand that they are different. In NZ we have 98 octane fuel. Surely it cant be the same measurement.:confused: