01-10-2020, 07:50 AM
I'm embarrassed to say that my 2011 CB has only 16,000km, many on the forum ride more than that in one summer. The oil and filter are changed every December / January each year ready for our summer where temperatures are often in the mid 30's and sometimes low 40's. After the initial run in period using Honda GN4 (10W30 mineral oil) I switched to HP4 (10W30 synthetic mineral blend) as it's available in a kit with a Honda filter and crush washer, and is the least expensive of all other options after including the OEM filter. Seems to work really nicely, there's no engine noises (rattles) on hot days. The bike doesn't get ridden in stop - start city traffic so I guess it the oil doesn't get some of the abuse that a commuter would need to handle.