The Lexus GX is powered a 4.6-liter V8 engine that pours out 301 horsepower and 319 lb-ft of peak torque through a 6-speed automatic transmission with full-time four-wheel drive. Fuel economy is rated at 15 mpg city and 19 mpg highway, for a combined average of 16 mpg. The powertrain gives the GX a towing…