Ha! Yeah, Alan, you're right. There are many old cars. They replace the power trains with Toyota 4 cylinder diesel engines. Diesel is easier for them to acquire and probably cheaper.
Jim - I think the diesel engines are cheaper for them to operate. They certainly are limited by economic opportunity. It was explained to me that government controls the wages. Most people make $50.00 per month. (Not a typo!) And a professional person, like a doctor, might make as much as $100.00 per month. Many people must try to work an extra job. I will eventually post an image of ISIS. She is a hostess at the front door of a restaurant/bar we discovered while walking around one evening. She was tall, good looking, posed for us to take pictures and spoke really good English. She told us that she is a psychologist; but "this is Cuba, so I must work another job!"