Hi Misiljenl, welcome. 93 is considered premium octane here in the states, it's usually anywhere between .30-.50 a gallon higher than reg 87 octane. 95 would be like race fuel!
Steve, I did ask the driver about the van. It is a transport van for a pet wash company . ( " You Lucky Dog" I think) so by law, they have to keep it 72*, even if it is over 100* here in north Alabama. The yellow stuff is spray foam insulation about 2" thick , for a r factor of 14 or so. The tubes with holes are an air recirculator. Pulls the cold air up from the floor ( cold air sinks) via an intake fan and redistributes it towards the warmer ceiling, letting the AC work less hard. It really was a great setup, and the vandwelling possibilities were awesome. The driver was not the owner, so I couldn't ask about costs, but it was Definatly a clean professional installation.