Try a search for RON MON and/or PON. See if that's any better.

I'm not trying to diss you or your dad, forgive me if it seemed that way.

 

Sorry, but he's ignorant if he recommends low octane fuel for a car boosting 19psi stock...if you notice the manual recommends 98 octane, which we can't even get here without a lot of trouble...I'm not disputing he can do maintenance, but to give a 2 hour lecture on something he so blatantly knows nothing about I'll let you have the last word but I stand by my comments. P.S. this article came up on the first page of a google search explaining what octane is. Granted it only takes into account the compression ratio but it's obvious that when you have an 8.8:1 compression ratio, but you are compressing air that is over twice atmospheric pressure, logic dictates the higher the octane, the better your car will run. Of course your ECU can compensate for 87 octane by retarding the spark, but the what's the point of having a high performance car if you are going to run pisswater in it and lose power?
http://auto.howstuffworks.com/question90.htm

 

machron1: that's 98 RON not 98 pump octane. 98 RON = about 94 pump.

(cool link tho )

 

Ah guess I just figured it was yet another jap/euro spec artifact like the adjustable wing and 6 disc cd changer Still higher than I can get here (92 (RON+MON)/2 ) but nothing a little 114 octane Toluene can't fix.

 

the cost for that toluene? whered you pick it up?

 

Why not just fill-up with 93 octane, and not tell your father? That would avoid the arguments and lectures altogether.

 

I live in cali and 91 is the highest we can get...~.~

so i have to mix 100 and 91 to get 94

 

about $30- for a 5 gallon drum from a place called Tarr in North Portland, OR. It used to be cheaper because you could refill the same drum, but I guess some new-ish law says they can't do it anymore . When I refill my tank I only get about 12 gallons, so mix in about 3/4 gal. of Toluene (114 octane (R+M)/2) before I fill up for something a little over 93 octane instead of 92.

(not counting the tiny bit I burn from my garage to the gas station, < 1 mile). $30/pop might seem like a lot, but you get about 6.66 fills out of it, so it's about $4.50 / tank, which replaces about $1.42 worth of gas, so it's only really $3.08 extra per tank, and it's well worth it to raise my fuel over 1 whole octane grade (instead of octane points i.e. 0.1 octane from those Brand X octane boosters...I don't trust them anyway who knows WTF witches brew they put in those __magic_snake_oil_brand_x__ boosters).

Edit: Here is a good link about Toluene: http://www.elektro.com/~audi/audi/toluene.html

 

do you use lubricants? i read since toluene isn't meant to be used in cars it will melt your gas tank and stuff..

 

What does it matter what your dad thinks? If the car is yours and you pay for the gas, I see no issue. If the car is his and he pays, you know the saying..."My way or...".

 

using anything lower then 91 will make the ecu pull major power to prevent pinging... even with 91, you do loose alot of power compared to 93. he is right that if you ran 100+ race gas on the evo, it may not be good in the long run. but with turbo cars and the evo's small 2.0 liter engine running hotter then bigger engines, pinging is a bigger issue...i use 93 octane at all times but if i am going to any track meets or any racing of a sort... then sunoco 94 octane is the way i'd do.. i wouldnt go over 94.

 

You gotta remember this is a father talking to his kid. He probably knows that his reasoning is bull**** but doesn't want his kid pissing away his money on 93.

Me, I **** my money away on 94. And the 4g63 loves it.

 

dudee where do live? its like $2 per gal for 91 here in cali right now..

 

Toluene is already in gas...I don't think gas melts your gas tank

 

All I can say is you're lucky I pay that much or more for 92 Give Us Sunoco in Oregon please!

PS Mifesto recommending "not going higher than 94" is baseless IMHO. If you are running 22psi in TX and it's 105 degrees out, I guarantee the ECU would be pulling timing like mad w/ 94 Octane. Also, if you are trying to idle around town in -32 degrees with 117 octane, you are probably going to have a hard time of it. It's all relative. The thing to remember is: Octane, potential energy, and quality/detergency of fuel are not related.

For example, The potential energy and quality of most pump gas is roughly equivalent regardless of grade (at the same station). Octane ratings according to studies around my area are pretty much what's on the pump even at the lowly Arco stations. Quality of gas normally depends on the quality of the underground tanks it resides in, and the detergency package added to it. For instance, you can run 100LL aviation gas if you want (in a car with no 02 sensor and/or cat) and it's not necessarily dirty gas, but it doesn't have a detergency package so it's not going to clean your system as it flows through like Chevron. Also, 2 gas stations could each get good gas, but one place stores it in rusty leaky old contaminated tanks while the other has brand new tanks. The gas that went in was the same, but the gas that comes out is not. I think somewhere in that gigantic paragraph there is a point...maybe someone else can make it clearer for me?