When I was rebuilding my engine I used Simple Green to clean it not wanting to discolor it. (case & heads)
It does discolor the engine. Later found Aviation grade Simple Green that does not discolor the engine, but it is more expensive & hard to find locally.
So depending on what the wheels are made of you might not want to use S. G. on wheels, or any soft grade aluminum.
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OE engine rebuilt,3.6 litre LN Engineering billet sleeves,triple row IMSB,LN rods. Deep sump oil pan with DT40 oil.
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