Hi guys. I would like to know if my engin has seperet ports for the oil and gas in the carbs,The reason is i would like to use sTp fuel injector & carburator cleaner to help keep my carbs cleaner. The sTp rep advised to use one oz per gallon of gas, if i have seperate ports for the oil. the cleaner will break the oil doun if it is mixed in the gas. thanks. J C.