Q: How do I get to the vegetable oil? Satan keeps shooing me away.

A: While for the other large items you needed to wave the corndog yourself, for this one you'll need to get Satan to do with waving. Distract him with some mention of his appearance behind the scenes and then switch his microphone with a corndog.

Q: I heard there was an alternate ending, how do I get it?

A: After switching off the Circuit Breaker in Max's brain you can go out and remind the tumour of your adventuring or crime fighting, the one you choose will determine the final scene after the credits. If you completely skip this conversation you'll get the adventuring ending.