This happens when the car hasn't been started for a week.(just use it on the weekends)
On a 2006 STI with 100,000 on the clock.
Is this normal - how long do you find your oil light stays on after starting?

 

Ive left mine for months before and it goes out instantly,i have had this on a couple of cars and it was a dodgy oil light switch both times.

 

Oil light should be off within a second of starting.

Seeing as how Subarus are so unforgiving of low oil pressure, I would advise that you hook the engine up to an oil pressure tester and verify you have adequate oil pressure.

It could be a dodgy oil switch as mentioned above or it could be a faulty oil pump or excessive bearing tolerances. The last two would require immediate fixing since they will cause extensive engine damage in short order.

 

As suggested check the pressure with a mechanical gauge, ideally in the OEM sensor location. I rarely see pump failures, but pickup failures are not unheard off...



If you're lucky enough to experience a crack before complete failure the symptom is oil light on too long at startup or occasional flicker at idle.

CHECK OUT MANY MORE PICS RIGHT HERE.

 

Mine goes out whilst cranking (I know this cos I changed the oil at the weekend)...00 STi wagon.

 

Cheers dude.
It is at the garage as we speak.

 

I know it's normal to stay on for a second or two after starting but 5 seconds seems quite long.