Volvo Trucks is showing its line of “optimized” regional haul models this week at the National Tank Truck Carriers’ 30th annual Tank Truck Show and Maintenance seminar in Houston.

Volvo is showing off Volvo VNM 200, VNM 430 mid-roof and VNL 630 models this week.

The optimized series includes eight models in all, designed to maximize payload and reduce fuel usage.

“In their constant quest for more fuel-efficient trucks, our customers are looking at every part of the fuel efficiency equation and that includes tractor weight,” said Gӧran Nyberg, president of Volvo Trucks North American sales & marketing. “For our customers, it’s all about the bottom line, and our Optimized Series delivers even greater value of ownership without compromising on features or performance.”

The optimized series includes:

Optimized day cabs, 430 sleepers and the VNM 630 model feature a Volvo D11 engine with 405 hp. and 1,550 lbs.-ft. of torque and the Volvo I-Shift automated manual transmission. The optimized Volvo VNL 630 model is spec’d with a Volvo D13 engine featuring 435 hp. and 1,750 lbs.-ft. of torque. All optimized series models utilize an aluminum fifth wheel, Michelin wide-base single tires, aluminum wheels, 6x2 tandem rear axle configuration with rear-tag axle and Volvo optimized air suspension rated up to 38,000 lbs.