Octane??

[blue2000s]

Because the air is less dense in the mountain states, the engine is less sensitive to knock, hence the lower octane requirement. 91 in the mountains is equivalent from an anti-knock standpoint to 93 at sea level. You WILL NOT make as much power as a car at sea level, but it's due to the density of air, not the octane of the fuel. Adding octane booster is a waste of money, and actually will drop power even further. In other words, what Kenny said.

[Timco]

Originally Posted by blue2000s

Because the air is less dense in the mountain states, the engine is less sensitive to knock, hence the lower octane requirement. 91 in the mountains is equivalent from an anti-knock standpoint to 93 at sea level. You WILL NOT make as much power as a car at sea level, but it's due to the density of air, not the octane of the fuel. Adding octane booster is a waste of money, and actually will drop power even further. In other words, what Kenny said.

So can I carry an oxygen tank with me and run a hose to the intake? Like nitrous?

[Jaak]

From the Canada Forum on Rennlist that I had posted:


Did the search:

To clear up a bit of confusion in North America we use a CLC measurement. CLC is 4 points LESS than RON which is used in the rest of the world so 95 RON is equal to 91 CLC. If your car needs 93 RON ... it will be more than covered with Shell 91. See this link Octane Ratings

Here's another link: Octane rating - Wikipedia, the free encyclopedia

In most countries (including all of Europe and Australia) the "headline" octane rating, shown on the pump, is the RON, but in the United States, Canada and some other countries the headline number is the average of the RON and the MON, sometimes called the Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), or (R+M)/2. Because of the 8 to 10 point difference noted above, the octane rating shown in the United States is 4 to 5 points lower than the same fuel elsewhere: 87 octane fuel, the "regular" gasoline in the US and Canada, is 91–92 in Europe. However most European pumps deliver 95 (RON) as "unleaded", equivalent to 90–91 US (R+M)/2, and some even deliver 98 (RON), 100 (RON), or 102 (RON).[2]



Sunoco 94 has close to 10% Ethanol. Look at the sticker on the pump.

[blue2000s]

Originally Posted by Timco

So can I carry an oxygen tank with me and run a hose to the intake? Like nitrous?

It's exactly what Nitrous Oxide injection does.