my oil light comes on when you slow down to stop. It is full of oil.

I had the same problem. Discovered it was because gas cap was not seated correctly on tank top. There are 2 notches on the cap and the tank that need to line up to put the cap on correctly. Yes it will go on without lining up correctly but it will cause the "oil light" to come on.

Also could be a faulty oil pressure sensor, ck youtube for location and replacement.