After some internet searching I found the info below:
The change intervals listed for most vehicles are for "normal" usage, normal being long trips on level ground at a steady speed. The different vehicle mfgs have similar lists of what constitutes severe, but when driving patterns are "severe" a shortened interval is recommended. None of my 4 wheel vehicles even mention "normal" vs. "severe" schedules, but I found lots of links referring to Ford, Mazda (my vehicles), and other makes having their own versions of lists of what constitutes severe driving conditions. Neither my Kawi owners manual nor the service manual for the Voyager say anything about normal vs severe schedule differences, so it is safer to assume that the schedule is for "normal" riding.
These conditions are usually something like:
1 Frequent idling for long periods of time, such as stop-and-go driving in heavy traffic. Many vehicles are subjected to this condition twice a day in commuting to major cities.
2 Sustained highway driving in hot weather, such as vacation travel.
3 Towing a boat or trailer, carrying heavy objects on a rooftop rack.
4 Driving in dusty conditions, such as dirt or gravel roads.
5 Prolonged operation at sub-zero temperatures.
6 Driving on steep hills or mountains on a regular basis.
7 Regular rapid acceleration (I'm sure none of us know any riders who are hard on the throttle
AAA estimates that at least 65% of Americans meet enough of these conditions that they should change their oil on the severe schedule (https://newsroom.aaa.com/2009/10/aaa...ot-realize-it/
). The Filter Manufactures Council suggests that it is closer to 80% (http://www.baldwinfilter.com/literature/english/10%20TSB's/94-1R1.pdf
I live in a metropolitan area. Stop and go is all there is around here. When I get on the highways, I am often stuck in barely moving traffic for long periods of time. The hotter the day, the longer the traffic jam seems to last. I haul heavy loads in my truck. I make fairly frequent short (5 - 10 miles) trips. On the motorcycle, once I do get out of town, I like to ride in the mountains of N. GA, N. Ala., and Western North Carolina. I ride in sub-zero weather. I pull a trailer on long trips. The only severe things from the list above I don't usually do is ride dusty roads or gravel roads and hard acceleration (well, most of the time). The Voyager calls for 7500 miles between oil changes. If that is for "normal" riding conditions, then I certainly do not feel like I'm wasting my money by changing the oil on a shorter schedule.