OP
I have 12 GX 160 5.5hp Honda engines running aid compressors. Don't even think of using a 20 grade as some have suggested. These engines suffer from serious fuel dilution so using a synthetic is a total waste of money because of the short change intervals.
In the summer I use an hdeo I find cheap and change at 100 hours. Winter I use a 5w-30 and monitor oil levels closely. The fuel dilution will increase the oil level to the point of being way overfilled if you are only running it for 20 minutes or less at a time.
Do not use a 20 grade.
I have 12 GX 160 5.5hp Honda engines running aid compressors. Don't even think of using a 20 grade as some have suggested. These engines suffer from serious fuel dilution so using a synthetic is a total waste of money because of the short change intervals.
In the summer I use an hdeo I find cheap and change at 100 hours. Winter I use a 5w-30 and monitor oil levels closely. The fuel dilution will increase the oil level to the point of being way overfilled if you are only running it for 20 minutes or less at a time.
Do not use a 20 grade.