Your previous post says you want to run 6 cans. What does the manufacturer recommend?

They don't specify an amount, I just want to run it till it's clean and clear.

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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.

OK. I'd run a can or two then drive the car for a week then give another can. Sludge builds up over time and won't dissolve completely. The first cleaning will soften sludge then driving will clear some away. You will then be able to use a second can to continue the process.

Think of a bucket that has mud on the bottom. it can be rinsed out but some will be stuck to the bottom. If you let it soak for a while then rinse again, more will come out.