Nobody can answer your question son....you must get a UOA and that will tell you how long of an OCI you can run....but if you want a rule of thumb answer....under normal driving conditions....most of todays SM rated conventionals should take you to 5K OCI's....
Yep - listen to the veteran members mate. I'd do 5k without a UOA long as you aren't redlining the engine all the way to work everyday. You REALLY want to know how your engine is doing with the oil? Get a UOA (used oil analysis).