A lot of folks aren't aware that Simple Green is a "concentrate"!!!

So I've seen it used full strength in applications that it shouldn't be, like wheels! In fact, other than cleaning graffiti off walls, it shouldn't be more than 50-50 water to Simple Green, and that is for things like engine grime.

Show car owners swear by this stuff, and they would be most concerned about ruining components than anyone I know.

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car

I spray gunk engine degreaser (foaming kerosene) or whatever degreaser I have on hand. After it soaks for a while I blast it with the pressure washer on a low-medium setting. Works great. I've never had a problem.

I have had bad experience with Simple Green etching alloys - even diluted. I don't use it on stuff I care about. It's great for cleaning oil off of the garage floor and basic cleanup.

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D.H.

04 ML500
02 E430

Experience is something you don't get until just after you need it.