Ford Explorer (2011)

The new Ford Explorer with an available EcoBoost2.0-liter I-4. Combining direct injection of gasoline and turbocharging, this advanced engine delivers performance comparable to normally aspirated competitive V6 engines. Developing up to 237 horsepower at 5,500 rpm, this I-4 delivers 250 lb.-ft. of torque.Estimated fuel economy improves by more than 30 percent, putting the fuel efficiency of the Ford Explorer in line with sedans such as the 2010 Toyota Camry V6.Like other Ford EcoBoost engines, peak torque is generated at a low 1,700 rpm across a broad band to 4,000 rpm. This torque plateau makes for flexible, efficient power delivery across a wide range of engine and vehicle speeds, while helping save fuel by making power at lower rpm levels. Ti-VCT, four valves per cylinder and DAMB valve lifters increase mechanical efficiency through improved engine breathing across the broad power and torque bands.A relatively high compression ratio is enabled by the use of direct gasoline injection, operating at fuel pressures from 2,200 to 2,800 psi. The unique turbocharger is optimally matched to the EcoBoost I-4 engine and SUV vehicle performance behavior. Precise fuel pressure control allows the Ford Explorer I-4 to deliver boosted power at low rpm, without annoying turbo lag.The EcoBoost I-4 uses 5W30-GF4 oil to reduce friction and reduce cost of ownership through 10,000-mile oil change intervals.