[speeder]

I have a project car that blew a head gasket and contaminated the cooling system with oil. I'm doing the HG job and plan on replacing the coolant tank and hoses but still need to flush-out the block and heater core, etc.

I've been give advice to use automatic DW detergent, (like Cascade), because it is low sudsing. Not sure how much grease-cutting power it has. This would be just run through the system hot for a short while after reassembly and then flushed with clean water.

I was thinking liquid Tide. It's also low-sudsing and definitely cuts grease and oil. It's what I use on my clothes and I'm a grease monkey.

What's best to use?