Is this ok to use in a cossie?!?!

was told by a mate there was a post ages ago saying NOT to use the engine flush's u get in the small tins as they can damage the turbo bearing or something as they contain thinner type stuff?!

But comma do 1 that u drain the oil out, then fill it to half the capacity with the flushing oil run it then drain it out and replace the oil.

Wanted 2 check first to be safe and fook anything