What Type of Gas?

[xRichieRich07x]

I have a 90 Eclipse GS 2.0 N/T...all i have right now is an exhaust because i've been working just on fixing the lil junker up...however i soon plan on installing headers, air intake, spark plugs, etc...just a bunch of small easy bolt ons....but my question is at what point should or could i start using higher octane gas? Help is appreciated.

 

[VtecvrsTurbo]

Higher octane as in 87 to 93? Or you want 101 or something?

 

[xRichieRich07x]

noo 101 is too high for my car even i know that i mean like 93

 

[perley03]

higher octane is not required for a n/t....it does not increase performance. all you are doing is throwing your money away, or even better just giving the billionaires of oil companies more money by buying higher octane.
you only need to use higher octane when you get knock. the higher the octane, the more heat is needed to burn that rating. plain old 89 octane is all you need. that is why turbocharged engines or engines with higher compression ratios require that higher octane due to increased cylinder pressures, or heat. if your old n/t is knocking, run higher octane till it stops knocking.
for more info go to http://www.ftc.gov/bcp/conline/pubs/autos/octane.htm it will tell you everything you need for higher octane.
hope this helps.
shawn

 

[VtecvrsTurbo]

The day I bought my car, (with 100,000 miles) I switched to 93. The old dude that owned it before me ran 87 from new. The fuel tank and filter were rusted because of that crap 87. There is nothing wrong with running 93 even when your car is stock. A little more power and a little more money.

 

[silver bullit]

You can put it in now or the next time your tank is low. Top it off and done.

 

[perley03]

87 octane gas will not clog up your filter....damm i wish you newbies would search before you "think" you know everything. read my post up above ^ or ask anyone else that has a clue about cars and fuel. HIGHER OCTANE DOES NOT INCREASE PERFORMANCE WITHOUT THE NECESSARY ITEMS!!!! YOU ARE JUST THROWING AWAY YOUR MONEY.
enough said, im done and tired.
shawn

 

[VtecvrsTurbo]

higher octane is not required for a n/t....it does not increase performance. all you are doing is throwing your money away, or even better just giving the billionaires of oil companies more money by buying higher octane.
you only need to use higher octane when you get knock. the higher the octane, the more heat is needed to burn that rating. plain old 89 octane is all you need. that is why turbocharged engines or engines with higher compression ratios require that higher octane due to increased cylinder pressures, or heat. if your old n/t is knocking, run higher octane till it stops knocking.
for more info go to http://www.ftc.gov/bcp/conline/pubs/autos/octane.htm it will tell you everything you need for higher octane.
hope this helps.
shawn

That form is b/s. Throw some 110 octane in your n/t and get it dynoed. Then switch back to your recomended 89 and tell me witch is better for power. plain and simple. p.s. lower octane gas has more water in it, therefore causing rust.

 

[nightspeed87]

it doesnt hurt to put it unless your not trying to spend the money for it,
Using 93 on a n/t is more so just for piece of mind but not really nessecary like posted above, but at the same time it helps because some gas stations use really cheap watered down dirt gas that hurts performance and longevity of parts, so 93 may come from a little bit of a more healthy source... Or maybe not, but the octane doesnt actually give power its just helps make more power, more so of an insurance thing in my opinion. ( At least 93 isnt a big enough jump in octane rating to make a big difference, yea if you use race gas maybe a different story, but basically you just need higher octane when tuning and raising a/f ratios and trying to run your car leaner.)

 

[perley03]

call it b/s if you want....do your research though before you call it b/s though....if thats the case then why dont you put 93 in and put some octane booster in a can in also to make it have more power????

 

[nightspeed87]

that octane booster stuff doesnt do anything.

 

[perley03]

exactly....and you think higher octane in a stock ( internaly stock) n/t engine is going to do anything also???

 

[nightspeed87]

really its just going to prevent knock better... But a n/t engine shouldnt be knocking unless theirs a fuel problem. A turbod engine is a different story because their is so much combustion you need more octane to control a more hazardous ( hotter, and leaner) engine enviroment. And really its possible to run low octane on a turboed engine as long as it doesnt knock, but you just wont be able to turn boost up or anything, octane ratings also just have to do with the heat, hotter air requires more octane just to run the same effiecency as lower air temps ( more boost more air / leaner/ hotter combustion chamber temps ) why do you think front mounts help lower knock a little, less heat inhaled...

Trust me I used to have a n/t and I tried a difference from 93 and 87 octane and there really was no difference it just ran a little smoother with 93 because 87 is so watered down and cheap, but there was no power gains, no faster 0-60 times, and the same top speed...

 

[perley03]

already stated that above nightspeed87....

 

[nightspeed87]

just backing you up on your point since ppl think higher octane will make ppl think they added horsepower to their engines or something.
just like ppl who think changing their spark plug wires to performance ones will give them 10 hp or sumthin.

 

[Quasimondo]

Octane rating does not equate to the quality of the gasoline. Octane ratings are measures of a fuel's anti-knock index. 93 octane has a higher resistance to spark knock because it does not burn as easily as a lower octane fuel (here's something to consider: diesel fuel normally has an octane rating of 40. It needs to have a low octane rating so the fuel can spontaneously combust when it enters the combustion chamber). This resistance to spontaneously combust is what allows 93 octane fuel to run safely on engines that use forced induction or have high compression ratios, typically any CR of 10.5:1 and up.

93 octane will not create a bigger bang than 87 octane. 93 octane is not more refined than 87 octane, and for that matter, the fuel in Japan and Australia is not of a higher quality than U.S. fuel. Their octane ratings are calculated using the RON (Research Octane Number) and ours is calculated by averaging the RON and the MON (Motor Octane Number). Since the MON is lower than the RON, when it's averaged out, our ratings will be lower, but in reality, the fuels are the same.

Until you add a turbocharger to your n/t engine, or raise the compression ratio above 10.5:1, chances are you will never be in a situation where you need to change to a higher octane fuel.

 

[markGSX]

perley03 = right
VtecvrsTurbo = spewing BS

goodnite

 

[xRichieRich07x]

woo wow I didnt think I would get so many mixed answers haha. Even though im a huge newb and dont know too much...id have to agree with what I've heard by many of my friends that higher octane wont give you more HP and that its just for knock and turboed engines...I was just simply asking it because it was something that I HEARD and was seeing if maybe I could get some back up on it or something...But I did learn one thing about 87 being crappy gas...you guys said it runs smoother with higher octane? I might try it out for about 2 weeks and see if it's worth the price of gas...I highly doubt it though thanks for the advice though