article thumbnail

AAA tests show premium fuel benefits some vehicles, but comes at a high cost

Green Car Congress

The trend toward recommending or requiring higher-octane fuel continues to rise as manufacturers work toward meeting stringent CAFE (Corporate Average Fuel Economy) standards. —Megan McKernan, manager of the Automobile Club of Southern California’s Automotive Research Center. Last year, nearly 1.5 improvement.

Fuel 150
article thumbnail

EPA: GHG emissions standards for cars and light trucks should be revised; joint process with NHTSA (updated with more reactions)

Green Car Congress

Administrator Pruitt also announced the start of a joint process with the National Highway Traffic Safety Administration (NHTSA) to develop a notice and comment rulemaking to set revised GHG emissions standards and Corporate Average Fuel Economy (CAFE) standards. The Obama Administration’s determination was wrong.

EPA 199
article thumbnail

ICCT-led test of 73 Euro 6 diesels finds large difference in NOx results under NEDC and more realistic WLTC

Green Car Congress

SCR technology can also improve fuel economy by allowing engine operation to be tuned to higher efficiency and higher engine-out NO x emissions (which are dealt with by the aftertreatment system), but it is limited by poor catalyst activity at low exhaust temperatures, especially during cold engine start events. km/h, or 81.50

Diesel 150
article thumbnail

Road Test: 2022 Lexus RX 450h F Sport AWD

Clean Fleet Report

The EPA rates fuel economy at 31 mpg city/28 highway/30 combined. Fuel economy reported by Clean Fleet Report represents the reviewer’s driving experience. Eco prioritizes fuel economy by optimizing throttle response and reducing the air conditioning output. Road Test: 2016 Lexus RX 450h Hybrid.

Lexus 94
article thumbnail

Road Test: 2022 Kia Rio S 5-door Hatchback

Clean Fleet Report

Excellent fuel economy, nice styling, low price and an excellent warranty. This combination delivers EPA fuel economy numbers of 33 mpg city/41 highway/36 combined. Kia’s iVT is a continuously variable transmission with intelligence that adapts shifts for improved performance and fuel economy. Drivetrain.

Kia 72
article thumbnail

Road Test: 2021 Hyundai Sonata Hybrid Limited

Clean Fleet Report

Smart mode will give you the best fuel economy while compromising slightly on performance. The EPA estimates fuel economy to be 45 mpg city/51 highway/47 combined: numbers that make Clean Fleet Report smile as we are happy to drive a car that is a serious fuel sipper. First Drive: 2016 Nissan Altima.

Hyundai 71
article thumbnail

Road Test: 2022 Honda Civic Sedan 1.5T Touring

Clean Fleet Report

Fuel economy numbers reported by Clean Fleet Report are non-scientific and represent the reviewer’s driving experience. non-turbo, fuel economy estimates are 30 mpg city/37 highway/37 combined. In both cases, the emissions have been reduced and fuel economy and performance increased compared to the 2021 Civic.

Honda 86