I used to commute in the City (San Francisco) for 6 mi in stop and go traffic and changed oil in 6 months according to the "severe" service schedule before getting laid off and now drive it about every week, also about a few miles each way but try to squeeze in a pass through the highway to get her up to speed (most drives are at least 10 min long). It's been 2 months of daily driving since the last oil change, and 3 months of weekly driving. Would weekly driving still require a "severe" oil change schedule, or can I do with the regular yearly oil change? I use synthetic oil.