What was added to fuel in the 90s to increase the octane rating?

The BTEX Complex Commonly referred to as gasoline aromatics, these compounds are refined from low-octane petroleum products into a high-octane gasoline additive. While some volume of BTEX is native to gasoline, it is also added to finished gasoline to boost its octane rating.

Does old gasoline lose octane?

In time, gas will lose octane. Octane is the combustible part of gasoline. The higher the octane rating (think 87, 89, 93), the better the air-fuel mixture and the better the combustion in the cylinders. Old gas also loses its volatility — how explosive it is — as it ages.

How long does 93 octane last?

93 octane fuels are more refined and contain more stable hydrocarbons. These stable hydrocarbons can last 2-3 times longer than 87 octane fuel. Even in proper storage 87 octane gas can start to degrade in 3 months, 93 octane fuel should last closer to 9 months before degradation is noticeable.

What is the best octane rating for gas?

Midgrade (the middle range octane fuel–generally 89–90) Premium (the highest octane fuel–generally 91–94) Some companies have different names for these grades of gasoline, such as unleaded, super, or super premium, but they all refer to the octane rating.

What is the difference between 95 octane and 98 octane?

Most cars run on 95, but 98 is available for vehicles that need higher octane fuel, or older models containing parts easily damaged by high ethanol content. Shell offers V-Power, advertised as “over 99 octane”, instead of 98. In the beginning of 2011 95 RON was replaced by 95E10 containing 10\% ethanol, and 98 RON by 98E5, containing 5\% ethanol.

What are the different grades of gasoline in the US?

Retail gasoline stations in the United States sell three main grades of gasoline based on the octane level: 1 Regular (the lowest octane fuel–generally 87) 2 Midgrade (the middle range octane fuel–generally 89–90) 3 Premium (the highest octane fuel–generally 91–94)

What was the octane level of gasoline in 1954?

When automobile production resumed in 1946 following World War II, gasoline octanes in the United States averaged at 79 for regular and 85 for premium and those numbers climbed year after year until 1954, when premium gasolines were rated as high as 94 octane and regular at 86.