Before you extend your OCI out to a year, consider the following questions: What is your commute like (time/distance/speed/number of days per week/city or hwy or mixed)? How often does the car NOT get up to operating temperature before it gets shut off? Does the car get parked in a garage our out in the weather?
My primary concern with a 'daily driver' that sees such low mileage would be that the oil isn't getting hot enough on a regular basis to drive off contaminants such as fuel and moisture. This could be considered 'severe duty' as opposed to a daily driver that gets driven 12,000 miles or more per year, which would seem to indicate a longer commute which would allow the car to get up to temp every time.
If you are doing a lot of very short trips which don't allow the engine and oil to fully heat up every time, I would for sure be changing the oil every 6 months regardless of mileage.
On the other hand, if the car does get up to temp nearly every time it is driven, is housed in a garage (at least in the winter) or sees a lot of highway miles, you could EASILY extend your OCI out to a year.