2004 DF90 oil light

[Amphib206]

above engine oil light flickers and flashes when started and continues to flash with throttle engaged. Zero alarms. Last year it was fine. This summer the flickering started. Runs fine. I find that after a long run of 15 minutes; it stops flickering. Oil level is right up.
Starting battery?
Wiring appears solid.

Suggestions?
thanks

[Lloydkelly]

Did you figure out what the problem is my DF-60 is doing the same thing the mechanic in the Suzuki dealer has never seen that before