Nice pics. Sunset time is when a lot of the car mags take pics of their vehicles. Browse through one some time. Note that the reflections on the sides of the vehicles almost always imply that there is a sunset going on, usually to the right and/or behind the photographer.
This is honestly about the best lighting scenario for automotive photography. It allows the photographer to be very creative with some warm, easy to use light.
Your second picture in the original post demonstrates what I'm talking about. Look at the reflection of the horizon down the side of the truck. Very cool.
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2002 Just Blue XE 4x4