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The semitrailer has a hose at the right and a control device at the left. The Octan logos on the truck are stickers.
This was the first Octan tank truck ever. A smaller one (not a semitrailer) was released in 1995 as part of 6562 Gas Stop Shop. The next Octan tank truck was not released until the advent of 3180 Octan Tanker in 2010, which was both considerably bigger and more realistic than its predecessors.