|Full Name||Ignatius McDog|
|Voice Actor||Carlos Alazraqui|
|Friends||Cat(Occasionally), Cliff, Shriek, Dog (Occasionally), Winslow T. Oddfellow,|
|First Appearance||Dog Gone|
|Last Appearance||Cone Dog|
Ignatius "Lube" Catfield-McDog (voiced by Carlos Alazraqui) A Hound dog, and the slowest one of the group and one of the main antagonists. He is a bloodhound mix. He'll forget what he's saying and slur his speech. He's the most loyal of the three Greaser Dogs. Despite his dull wit, like his parents, Lube has lots of musical talent and can sing very well. Also, it is revealed to be fluent in Spanish, shown in the episode Sweet and Lola. It is important to note a character design modification that occurred after the first episode; in "Dog Gone," Lube appeared with black dot eyes and long brown hair that extended down to his nose. In subsequent episodes, his appearance was changed and remained that way until the end of the series. In one episode he rolls up his right trouser and takes off a wooden leg. He also works part-time as a mechanic. His parents, a cat mother and a dog father, appeared in the series finale and said that Lube got separated from them a long time ago. Also in the series finale, Lube is shown to have had a sister, who tries to marry Cat. When the Greaser Dogs usually agree on something Lube usually says "Yeah, what they said!"
Lube has brown hair, a big red nose, a green vest, blue jeans and black shoes. and little black eyes and a green shirt and also Dog ears on the left and on the right.
In "Dog Gone", his first appearance is very different from his later appearances. In comparison to his typical appearance, he has two spots in his head, different hair style, small black eyes, different eyebrows, and two visible teeth.