There is a Thompson Mobile Refuelling Unit at the Bull Creek Museum, Perth WA, built in 1938 by the Thompson Brothers (Bilston), Staffordshire, England.
Has a 4 cylinder 10 HP engine and 2 x 250 gallon tanks with a refuel rate of 18 galls per min. Marked up as 'Shell Aviation Service'. Have a picture somewhere but can't find at the moment.