2006-11-29 05:37:41 · 13 answers · asked by CXfan 4 in Cars & Transportation ➔ Maintenance & Repairs
If not, then what do we call gas that is higher than octane 94
2006-11-29 05:43:31 · update #1
The higher the octane rating, the LESS combustible it is. High compression engines require higher octane (slower burning fuel, like aviation fuel) to avoid the pre-ignition knock. Older engines needed the lower octane (high combustible fuel) because they got more HP from a loose engine. (That's why they got 80K miles and needed a rebuild.) The lead in the fuel was used as an internal lubricant. Due to the pollution and lead emissions, unleaded gas was formulated using other compounds.
2006-11-29 05:54:50 · answer #1 · answered by ironbrew 5 · 1⤊ 0⤋
No. The lead compound that was added to increase the octane rating has been replaced by other compounds that do not contain lead. Technically, if you were using pure trimethyl 2-2-4 pentane, you would be having 100 octane rating (because trimethyl 2,2,4 pentane IS octane) and there would not be a single atom of lead around.
So why don't we use pure octane? Because it is a very small proportion in crude oil. The bulk of it is stuff with more knocking potential, so chemical treatment and additives are needed to raise the octane rating.
Only gas that does actually contain lead -- and it can have a rating less than 94 RON -- is leaded.
By the way, aviation gasoline can have an octane rating that is HIGHER than 100. It is all in the careful selection of the chemical constituents and additives in it.
2006-11-29 13:45:07 · answer #2 · answered by Vincent G 7 · 1⤊ 0⤋
Leaded gas has lead in it. They don't put lead in gas now because leaded gas is more toxic to us than what unleaded gas is, probably because of having to breathe in the lead after it gets into the atmosphere. I think octane 94 gas would be at least the mid-grade gas if it isn't premium.
2006-11-29 13:40:30 · answer #3 · answered by Bear 5 · 0⤊ 0⤋
any time the octane goes over 100 they have to add lead toboost it up but no 94 does not have to contain lead. I 'm not saying that it does not have lead some companies will add lead to get more for their money.
2006-11-29 13:43:36 · answer #4 · answered by roy40372 6 · 0⤊ 1⤋
Aviation fuel is the next step up from 94 then you get in to racing fuel and so on. Lead has been banned in north America as a fuel additive.
2006-11-29 13:49:19 · answer #5 · answered by Anonymous · 0⤊ 0⤋
There's no such thing as leaded gas anymore!!!
the higher the octane, the better the gas
2006-11-29 13:43:15 · answer #6 · answered by nate_625 3 · 0⤊ 0⤋
No.
Octane refers to the volatility of the fuel. Higher octane fuels combust easier/quicker.
Up until the 1970s let was used as an additive in gasoline. It's primary function was as a lubricant. When the environmental hazards of lead as a gasoline additive came to light manufactures started designing their engines so that they would not require the led.
2006-11-29 13:42:15 · answer #7 · answered by Anonymous · 0⤊ 2⤋
No, it's merely considered high octane unleaded gasoline. There has been no lead in gasoline since 1977.
2006-11-29 13:42:33 · answer #8 · answered by oklatom 7 · 0⤊ 0⤋
No
2006-11-29 13:39:00 · answer #9 · answered by Blunt Honesty 7 · 0⤊ 0⤋
Uh, No.
2006-11-29 13:40:19 · answer #10 · answered by Silverstang 7 · 0⤊ 0⤋