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I have a 2008 Shelby GT 500 The owners book says to use 5-50 w oil. Can I use 20-50 instead with out damage? Royal Purple doesn't seam to have...
:thumbsup: Life long dream come true I now have an 08 Shelby GT500 and love it. It's a daily driver, white with blue stripes. Thank You Mr. Shelby...
