Several gas-powered trimmer versions are offered by ryobi. A number of them have motors while some have two-cycle versions. The four-cycle motors are more powerful than the two-cycle ones and require a different type of oil. Ryobi’s four-cycle gas trimmers use SAE 30-weight oil, which also is used for other equipment with small engines, for example some lawnmowers.
Employing the Oil
Insert the Ryobi four-cycle trimmer oil and gas to different compartments in the machine rather than mixing the oil and gas together. Apart from being SAE 30-weight, the oil should have the appropriate American Petroleum Institute designation too: SF, SG or SH. Look on the front and rear labels of an SAE 30 oil jar for your API designation to ensure you use the right oil for the trimmer.