how about xylene then? no lead, 120 octane.

 

Definition: A value used to indicate the resistance of a motor fuel to knock. Octane numbers are based on a scale on which isooctane is 100 (minimal knock) and heptane is 0 (bad knock).

Also Known As: Octane Rating

Example: A gasoline with an octane number of 92 has the same knock as a mixture of 92% isooctane and 8% heptane.

 

i run on amco silver i think its 89, its never had any fuel probs on it, runs bad on 87, looses hp with 93, so i run 89.

 

What are xylenes?
(Pronounced zy'leen)

Xylene is a colorless, sweet-smelling liquid that catches on fire easily. It occurs naturally in petroleum and coal tar and is formed during forest fires. You can smell xylene in air at 0.08–3.7 parts of xylene per million parts of air (ppm) and begin to taste it in water at 0.53–1.8 ppm.

Chemical industries produce xylene from petroleum. It’s one of the top 30 chemicals produced in the United States in terms of volume.

Xylene is used as a solvent and in the printing, rubber, and leather industries. It is also used as a cleaning agent, a thinner for paint, and in paints and varnishes. It is found in small amounts in airplane fuel and gasoline.

 

Hey, whats the differnce in 114 occtane and Cam 2?

 

chevron, 87. 90% of the time
different brand when not near a chevron since i'm not really picky. i have never had a fill up that made my car run badly though.

 

Winter blend could be the cause, as well as the fact that different dealers have slightly different blends of gas, and different regions have different gas requirements. Oxygenated gas is espeically known to cause pinging problems in engines that have a lot of carbon deposits, and moving up to a higher octane gas usually helps relieve this condition. Also, gas goes bad when sitting for a long time, so if you let your car sit, or if the gas was sitting in the main tank at the gas station, then that could be the problem. Here are some of the pump gas formulation regions:
http://www.exxon.com/USA-English/Fil...p%20100102.pdf

87 octane is gasoline that has the same knock characteristics as 87% iso-octane / 13% n-heptane, but it does not necessarily contain those exact ingredients. The octane rating is a benchmark, not a chemical composition formula.

TEL increases the octane rating, not the actual octane level. It also acts as a lubricant and shock buffer.

Many additives will boost the octane rating over the 100% octane benchmark. Common additives include xylene (117 octane), toulene (118 octane), benzene (105 octane), ethanol (103 octane), and methanol (103 octane). Octane ratings are approximate, and are calculated with the American R+M/2 method.

* Do not add these to your gas tank unless you know what you are doing, because these additives can blow your engine, shellac your engine's internals, eat through your fuel lines and gaskets, absorb water into your gas and rust your engine and fuel system from the inside out, and cause other nasty damage.

 

Don't know the validity of this web site, but here:
http://www.nsxprime.com/FAQ/Miscella...lAdditives.htm

I use Chevron with techron in my crx and I have never had a bad tank.

-Ben

 

actually octane is made up of 8 carbons thats why it is called "oct" ane. Also lead was banned becuase first off it would clog any normal cat within minutes also it covered the earth in a thin layer of lead which is not good for anyone

 

I've never noticed any difference between brands of gas, but I usually buy Esso (Exxon) because it's cheaper for me. Just a personal feeling - I think anyone who's noticing a difference is probably experiencing a problem at one time over another, or has been a victim of marketing.

I run 87 because I don't feel like paying for 92 and not getting anything for it. If I was running higher boost then I probably would for the insurance value. Why am I going to see detonation at stock boost?

 

Tonight I filled 'er up with a nice fresh tank of Amaco 'Ultimate' 92 (at &^%#@-ing $1.819/gallon! Stupid Maryland prices. I'm going home to 'Jersey and save some loot!)


Anyhow, she HATES it! Coughs, sputters, struggles to idle and stalled twice.


...

 

Over here in the bay area we are paying around $1.80-$1.90 for 87 octane. You shouldnt complain.

 

i usually use 76 or chevron 87 octane

 

If the gas station looks cheap or doesn't get much traffic, I don't go there. 87 for me. In a thread just like this a few weeks ago someone mentioned how gas stations add 'preservatives' so to speak, which is bad, of course.

 

Is it true that all gas stations or most in a local area get all their gasoline from the same refinary?

When do they put in their additives because each company has their own thing like 76 has propower and chevron has techron.

 

TRUE


Many use the same additives also.

 

Now that that question is answered, why do all of us pay more for a "quality" gas station?

Personally I only use 76 and nothing else. In San francisco, Olympian gas is sooo much cheaper than everything else but I dont feel safe using it.

 

FWIW Xylene is the main solvent in most carb cleaners.

 

i use 94 from shell or bp.. shell seems to work better tho

 

I have heard of some people putting paint thinner in there gas to raise the octane rating. Wouldn't that dry out the internal metals and such??

I mean we add 2 cycle to lube the rotors on their trip around, so wouldn't paint thinner do the opposite?

 

argh too much stupidity in this thread!!!

 

OK.... A little follow-up. My 'gasoline' issue went on for almost two years. Usually during the summer I could fill up and it would run fine, but over the two winters it ran terrible no matter where I got gas from. It's a 'vert, so I didn't drive it much in the winter anyway, and while it annoyed the heck outta me, I let it go.

In the meantime, I replaced the O2 sensor, plugs, wires, fuel filter, adjusted the TPS repeatedly and replaced the TPS, all with no change.

This week, after my second 'bad tank' in a row and facing the probability of spending another winter without my baby I broke down and took it to a local guy I found a few months back who specializes in RX-7s.

He had it back to me by the end of the day purring like a kitten! Fuel pressure sensor was bad. (He said he checked everything else first, too)

I'm a happy camper! I can't believe I let this stupid issue drag out for two years!

 

There is no fuel pressure sensor on second gens.

 

Sensor. Regulator. Whatever....


You're detracting from the grandeur of the story, ya'know.

 

I only use Sunoco.. my room mate swears by it and uses sunoco 94 in his 11 second talon for daily driving. (no it wont hit 11's on pump gas) but yah, if it's good enough for his car, then Sunoco 87 is good enough for my 7 :P