Good..... nothing magical, but good.
I sprayed the engine from above, left it for about 10 minutes and then took the sprayer I have for the garden and rinsed it off (the one for plant chemicals).
Ok, the dirt came off without any issues afterwards.
Mini Cooper clubman S

I can say that it cleans the plastic parts of the engine well, but not the aluminum and iron parts that have retained most of the dirt. Of course, with a little scrubbing it comes off, but nothing amazing. It will be tested until the bottle is finished and we'll see.

You put a bag to cover the dynamo just in case, spray everywhere, wait 5', rinse with the garden hose. Good result, if you do it once a year the engine will always be shiny. For better results, scrub the product with a brush. The bottle gives me 3 washes for Honda Jazz.

I didn't expect it to work miracles but it did!
I applied it to a wet surface and simply let it act, without brushing it. I waited for 5-7 minutes and then rinsed it off by spraying water in the form of a shower.
VW POLO TDI with 200,000 km. The central protective cap in particular became like new!
Amazing job! I was impressed with the result because it cleaned very well without any manual labor

Very good... You leave it for 5 minutes and rinse with water and the result is amazing.... it leaves nothing behind