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  2. Octane rating - Wikipedia

    en.wikipedia.org/wiki/Octane_rating

    An octane rating, or octane number, is a standard measure of a fuel's ability to withstand compression in an internal combustion engine without causing engine knocking.The higher the octane number, the more compression the fuel can withstand before detonating.

  3. List of U.S. states by standard octane ratings - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._states_by...

    Most states do not mandate certain standard gasoline grade octane ratings.In the United States and Canada, octane ratings are in AKI, commonly shown as "(R+M)/2".All states require gas pumps to be labeled with the correct octane level and nearly all states do regular testing to make sure gas stations are in compliance.

  4. Top Tier Detergent Gasoline - Wikipedia

    en.wikipedia.org/wiki/Top_Tier_Detergent_Gasoline

    Top Tier fuels must maintain levels of detergent additives that are believed to result in a higher standard of engine cleanliness and performance as compared to the United States Environmental Protection Agency (EPA) requirement. In addition, Top Tier fuels may not contain metallic additives, which can harm the vehicle emission system and ...

  5. Octane - Wikipedia

    en.wikipedia.org/wiki/Octane

    Octane is a hydrocarbon and an alkane with the chemical formula C 8 H 18, and the condensed structural formula CH 3 (CH 2) 6 CH 3. Octane has many structural isomers that differ by the location of branching in the carbon chain. One of these isomers, 2,2,4-trimethylpentane (commonly called iso-octane), is used as one of the standard values in ...

  6. Cialis Side Effects: What to Expect (& How to Avoid Them) - AOL

    www.aol.com/cialis-side-effects-expect-avoid...

    Tadalafil can affect nitric oxide levels inside your nasal cavity, giving you a stuffy nose that could make it difficult to take in the pheromones. As with many other Cialis side effects, nasal ...

  7. Mortgage and refinance rates for Dec. 26, 2024: Rates for 30 ...

    www.aol.com/finance/mortgage-and-refinance-rates...

    Average mortgage rates continue to rise as of Thursday, December 26, 2024, pushing 30-year fixed rates to their highest levels since July. It's been a week since the Federal Reserve announced ...

  8. We all need HGH, the hormone responsible for growth. What ...

    www.aol.com/hgh-hormone-responsible-growth...

    Human growth hormone (HGH) is a hormone that’s essential to our development. Most people produce enough HGH throughout their lifetime. But for those with a deficiency in growth hormone (or a few ...

  9. Gasoline - Wikipedia

    en.wikipedia.org/wiki/Gasoline

    As South Africa's largest city, Johannesburg, is located on the Highveld at 1,753 meters (5,751 ft) above sea level, the Automobile Association of South Africa recommends 95-octane gasoline at low altitude and 93-octane for use in Johannesburg because "The higher the altitude the lower the air pressure, and the lower the need for a high octane ...