Day of the Diesels has been winning a positive reaction from fans but has now claimed the No. 1 spot in Tesco's DVD Family Chart.
The 2011 special set before the Fifteenth Series has beaten off the likes of Barbie, Peppa Pig and even Chuggington to recieve the achievement.
A few days before it came out on UK DVD, the hour long episode's release had entered the charts early owing to it's pre-order requests, where it was placed in 10th but has since climbed dramatically.
Day of the Diesels is now available to buy on DVD/Blu Ray in UK, US and Australasian stores.