Topic: How to clean the oil tank?

[climbingaz]

I searched, I promise I did. 

How do you go about cleaning out all the sludge from the inside of the oil tank?

Thanks!

[Yoshi823]

Flushing oil?

Petrol?

I'd use very hot water and plenty of washing up liquid...then rinse with very hot water then leave to dry in the hot cupboard.

[Bob Wessner]

I used a fairly hot, 50/50 solution of Simple Green and water. I let it sit for several hours, then rinsed with hot water until it was clear. Did a great job. Some of the gunk on the bottom, below the lip of the drain hole was pretty solid beforehand.