ive been dealing with a weird oil residue covering my rear bumper after long runs. TT vg30dett, built motor, rods pistons cams etc 500hp on 18psi drives perfect no issues compressions fine powers good boost fine turbos rebuilt intact stock pcv system not sure what else it could be really. unless turbos are getting to much oil or something.. restrictors are in place tho ! czp oil lines anything else i that would cause this residue??
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