|Color: Mustard Yellow with Cream Stripes|
|Occupation: Leader of the Diesels|
|First Appearance: Thomas and the Magic Railroad|
|Performer: Matt Wilkinson (UK/US)|
Diesel 10 is an evil diesel engine with a semi-sentient roof-top, hydraulic claw, which he has named "Pinchy".
Diesel 10 is the master of mischief on Sodor. He likes trying to outwit the Steamies, often causing confusion and delay. When Diesel 10 is around...there will be trouble.