Search results
Results from the WOW.Com Content Network
The octane rating of gasoline is measured in a test engine and is defined by comparison with the mixture of 2,2,4-trimethylpentane (iso-octane) and normal heptane that would have the same anti-knocking capability as the fuel under test. The percentage, by volume, of 2,2,4-trimethylpentane in that mixture is the octane number of the fuel.
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. A minimum 82 octane fuel is recommended for most vehicles produced since 1984.
The price of regular unleaded gas on average was $3.063 per gallon on Tuesday, down from $3.183 a month ago and $3.313 a year ago, according to AAA. This story has been updated with new information.
A low octane rated fuel may cause engine knocking and reduced efficiency in reciprocating engines. Tetraethyl lead was once widely used to increase the octane rating but are not used in modern automotive gasoline due to the health hazard. Aviation, off-road motor vehicles, and racing car motors still use leaded gasolines. [2] [3]
Companies that pay dividends have outperformed non-payers by more than two-to-one over the last 50 years (9.2% average annual total return versus 4.3%), according to data from Ned Davis Research ...
The One Chicago franchise includes three scripted series that follow first responders and medical professionals in Chicago. New episodes air Wednesdays, and old episodes are available to stream on ...
There were two grades of aviation gasoline produced in volume in Germany, the B-4 or blue grade and the C-3 or green grade, which accounted for about two-thirds of all production. B-4 was equivalent to 89-octane and the C-3 was roughly equal to the U.S. 100-octane, though lean mixture was rated around 95-octane and was poorer than the U.S. version.
World markets enter 2025 increasingly exposed to U.S. trends - a risk factor that burst into life after the Federal Reserve roiled markets this month by pointing to fewer rate cuts in the year ahead.