I'm thinking of putting this in my engine oil prior to changing the oil.
Its suppose to remove sludge.

Directions state you pour the entire bottle in and let it idle for 10-15mins.
Then completely drain the oil/flush mixture. Finally, add new oil change w/ new filter.

my only concern is how this flush will treat the rubber seals and piston rings.

What are you guys' thoughts?
Is there another brand you have used with great success?