I was just cleaning the wheels after the X had recently busted front CV boots and Bug & Tar Remover got the grease off very nicely. I use a 1300 psi pressure washer and I had to do 3-4 applications per front wheel where the grease was, followed by some Mother's wheel cleaner spray and light brushing, but I'm real satisfied with the results.
http://www.xoutpost.com/116618-post4.html

JV

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JV

What gets us into trouble is not what we don't know...it's what we know for sure that just ain't so