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Our 2012 3.6R Outback Limited is 9 months old with 7000 miles. in the recesses for the lug nuts and a bit on the outside wheel surface, there is a sticky black tar-like gunk. I can get a bit off with my fingernail and it is think and sticky, but not viscous.
What is it and how do I clean it? Warm soapy water and a rag helped some but only got about half of it.
A toothbrush got some but quickly filled up with the black gunk and became useless.
What is it and how do I clean it? Warm soapy water and a rag helped some but only got about half of it.
A toothbrush got some but quickly filled up with the black gunk and became useless.