from what i have directly seen myself in domestics (and i'm assuming imports with their tighter tolerances), its a big no-no.
I actually witnessed someone's engine go after they had an oil flush done. Basically, you have built-up oil deposits - all of a sudden - freed from their bases. You have chunks of carbonized and sedemented oil floating around in the engine. Many times, the engine bearings or oil pump can't "chew" (can't swallow) that crap and it gets stuck. Viola!: engine damage from oil starvation.
IMHO, oil flushes at service places are like in-car fuel injector cleanings at service places: something to sell the consumer with very little benefit. Kinda like changing drivebelts at 30k...
Don't waste your money on this sorry-ass and unneeded "service" garbage.
I actually witnessed someone's engine go after they had an oil flush done. Basically, you have built-up oil deposits - all of a sudden - freed from their bases. You have chunks of carbonized and sedemented oil floating around in the engine. Many times, the engine bearings or oil pump can't "chew" (can't swallow) that crap and it gets stuck. Viola!: engine damage from oil starvation.
IMHO, oil flushes at service places are like in-car fuel injector cleanings at service places: something to sell the consumer with very little benefit. Kinda like changing drivebelts at 30k...

Don't waste your money on this sorry-ass and unneeded "service" garbage.