Engine Flush?

I never cared to use it. Your car's engine should be fine with out it. Just keep the oil change schedule consistent.

They're geared towards extremely dirty or neglected engines, but I wouldn't even use them on those. Here's why. They have a more concentrated detergent effect on the engine than the regular engine oil, but in the case of an engine with a lot of sludge, that might actually cause clumps of crud to break loose and float through the engine, clogging narrow oil ports. Think sort of a stroke in your engine.

If your engine is that dirty, it's best to do a professional flush with solvent. Much safer when the engine isn't running!

(Your engine probably isn't that dirty, and those products aren't needed)