No Sir York, I have never driven a semi before , most people assume that I have because they associate Diesel's with big trucks.
Diesel farm tractors & pickup trucks are all I have ever driven, if you know how to drive them their is not a more efficient motor on the planet ... that I know of...
I do LOVE BLACK SMOKE THO
Like the time a guy with a convertible tail gated me for 20 miles while pulling my horse trailer
the first town with a red stop light and he was in the right lane just about at the back of my truck, when the light turned green I got the truck just rolling and slammed it into second gear to soon and put it almost to the floor.... well you couldn't even see the guys car through all the BLACK SMOKE

" to much fuel and not enough O2 makes black smoke" well let's say when he finally passed me waving his hand, I think he was trying to say I'm number ONE in his book.
My trucks pull my trailers at or above the posted speed in case you might be thinking of one of those yahoos you get behind doing 45 MPH on the HWY
TAILGATERS .... RAMBLING ON....

C YA