Search results
Results from the WOW.Com Content Network
[97] The Associated Press said premium gas—which has a higher octane rating and costs more per gallon than regular unleaded—should be used only if the manufacturer says it is "required". [98] Cars with turbocharged engines and high compression ratios often specify premium gasoline because higher octane fuels reduce the incidence of "knock ...
Engine efficiency of thermal engines is the relationship between the total energy contained in the fuel, and the amount of energy used to perform useful work. There are two classifications of thermal engines- Internal combustion (gasoline, diesel and gas turbine-Brayton cycle engines) and
Under ideal (adiabatic) conditions, the ratio of specific heats would be 1.4, but a lower value, generally between 1.2 and 1.3 is used, since the amount of heat lost will vary among engines based on design, size and materials used.
The largest component of the average price of $2.80/gallon of regular grade gasoline in the United States from 2012 through 2021, representing 54.8% of the price of gas, was the price of crude oil. The second largest component during the same period was taxes—federal and state taxes representing 17% of the price of gas.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Law requires the Premium Plus grade to be 97 RON or higher; Premium at 95 RON; Regular at 91 RON. [75] Premium Plus grade fuels are exempted from having an ethanol blend, [76] although the only Premium Plus grade available without ethanol is Petron Blaze and is rated at 100 RON. Other Premium Plus grades like Seaoil Extreme 97, Shell V-Power ...
The choice of working fluids is known to have a significant impact on the thermodynamic as well as economic performance of the cycle. A suitable fluid must exhibit favorable physical, chemical, environmental, safety and economic properties such as low specific volume (high density), viscosity, toxicity, flammability, ozone depletion potential (ODP), global warming potential (GWP) and cost, as ...
But the cost to drill a new well is about $45 to $65 a barrel, he said. Because the company wants to cover its costs and make about a 15% profit, “if prices got any lower, we would stop ...