I made 6-connective weekend trips to a neighboring city. I came across many 18-wheelers on the interstate highways. Some were old, boxy Peterbilts, some were very aerodynamic looking Freightliners and Volvos. Regardless of the boxy cabs, or aerodynamic cabs, they all have some kinds of "add-on" to improve the aerodynamic of overall setup. Without out a doubt, the raised wind deflector over the trailer was every one I have came across.
Another interesting observation about the trucks - there are only a few brands of truck cab integrator:
The top-selling brand of semi truck is Freightliner; it sells about a third of the 190,000 new semis sold annually. Freightliner is owned by Daimler Trucks North America, which also owns the Western Star brand. Second most popular is Navistar International, followed by PACCAR, which owns the Peterbilt and Kenworth brands. Fourth is Volvo, which also owns the Mack brand
Freightliner
Peterbilt / Kenworth
Volvo / Mack
International
Ford
Further more - Detroit Diesel, Cummins are popular engine choices for truck manufactures that don't have their own branded engines.!
Newer Semi Tractor Trucks
FREIGHTLINER COLUMBIA 120 (CL120)
Peterbilt 386 /Kenworth T2000
Volvo VNL series, 670 (Volvo 3 types of engines)
Truck operating expense
1. Payment, if any - car loan
2. Insurance, driving habit
3. Vehicle operating expense
maintenance
wear and tear items
scheduled, expected repairs
fuel tax
Reefer - refrigerated trailer
What I had in mind was about the preventative maintenance program (PM) offered at may truck stop/commercial vehicles. In this case "Reefer" refers to the refrigerated container, or shipping trailers equipped with refrigeration system.
The refrigeration trailer/container uses combustion engine to generate the power to run the refrigeration system. It also requires the PM like tractor and trailer.
2007 Volvo 780 - 10 speed Auto $19k
2007 Volvo 780 0Volvo 465, Auto 10, FUEL SQUEEZER, 2 YRS AGO INFRAME MOTOR, 18 OLD TRANS, WELL MAINT, 80% TIRES, 30 DAY WARR. limited, NO OIL LEAKS, NO BLOW BY,