Yes, I was commenting that the use of "18 wheels" for "18 wheeler" suggests someone not very familiar with American English.
I see what your saying, I didn't even notice it... yes your right the term they used was not the common term americans use. I just saw where they released a 18 wheeler simulation game in August 2001 which totally sucks, but I know they could have enrolled and attended a truck driving school before 9/11/01 with out a problem.
Here is the write up on the game