Brickipedia
“The wagon is compatible to every 9V train. All items in this set, including the minifigure and the oil drums, are labelled with logos of the fictional Octan oil company.”
Full review at brickipedia.fandom.com
“Compatible with minifigs and 9V trains, but the train car is somewhat smaller than it would be in "real life". This adds some unusual pieces to your collection. A railroad car with two Octan tanks on it. A flatbed truck that can carry one cargo unit.”
Full review at alumni.soe.ucsc.edu
“The sets show the very well-known and recognizable tank wagon with an Octan truck carrying fuel barrels and a lesser-known railway crane. The sets are separated by two years (1993-1995) and color scheme. The tank is in Octan colors, i.e. the well-known white with red and... More green. The crane, on the other hand, is a mixture of black wagon bases (in the case of the tank as well), yellow, red and green.”
Full review at legosoul.wordpress.com