Oil light come on after about 30 seconds of eng runnig, Oil is up to spec, Any Ideas. Please Help.

 

When is the last time the oil was changed?

 

oil level could be low, could be a problem with the oil pump, junk in the oil sump clogging up the pickup, or an oil filter with a nonfunctional bypass valve. Could be a lot of things, basically. Easiest/cheapest thing to do (if it hasn't been done recently) is to just change the oil and filter, see what happens.