I believe Honda's OCI recommendation is 5,000 miles severe service and 10,000 miles normal service. Honda spells out very plainly what they mean by severe and normal service. Since Fernando R's primary usage is around town, 10,000miles is pushing the OCI according to Honda.
Having said that, this interval was not overdone. Also, in my experience with my K20A3 engine, Mobil Clean 7500, Havoline 5w-20, and Valvoline Durablend all had lower TAN than Mobil 1 after 7200 mile intervals.
Having said that, this interval was not overdone. Also, in my experience with my K20A3 engine, Mobil Clean 7500, Havoline 5w-20, and Valvoline Durablend all had lower TAN than Mobil 1 after 7200 mile intervals.