This is the best cleaner I have come across for cleaning my engine and engine bay. Purchased for $1 at the Dollar Tree. Sprayed it and rinsed it. No scrubbing and my engine was cleaner than When I used GUNK: Engine Degreaser or Black Magic: Engine Degreaser + Shine.
I am very happy with this product. I personally wouldn’t bother buying anything else.
This cleaner is safe for aluminum and rubber. DO NOT USE CONCENTRATED ON GLASS! If you get it on your windows, rinse it off quickly, it can leave stains on glass.
This cleaner is non-toxic AND bio-degradable according to their website.