I'm doing 3k on my mazda DI, especially in cooler weather.
Fuel dilution in cool weather.
Good decision. I do 6 months or 5K whichever comes first on my Golf.
My manual says 10,000 miles or 1 year under normal conditions.
When they say normal condition it actually means ideal condition where oil reaches operating temperature of at least 212°F at which point moisture and other contaminants start to boil off or evaporate. How many of us are in that crowd? Not many.
Quite some time ago I remember reading a research paper presented by Association of Oil Filter Manufacturers and they concluded that majority of us (over 80%) drive under severe driving conditions and suggested to cut OCI in half or more.