chris1992 Posted March 17, 2007 Report Posted March 17, 2007 Is it ok if i run pump gas just plain unleaded with royal purple on a 400 cub motor? Quote
woodro77 Posted March 17, 2007 Report Posted March 17, 2007 Is it ok if i run pump gas just plain unleaded with royal purple on a 400 cub motor? do a compression test , thats what determines whether or not you run race fuel Quote
Banshee0028 Posted March 17, 2007 Report Posted March 17, 2007 Is it ok if i run pump gas just plain unleaded with royal purple on a 400 cub motor? It will depend on your compression, but I would at least run 93 premium Quote
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