The problem: the red engine oil warning light inside the instrument cluster (not the check control) lights up after some driving. (mechanics.stackexchange.com)
This was the first oil warning hazard sign we saw along our route. (travelingmamas.com)
The exhaust system has been improved, a low oil warning light added, and for the ZR - 1, the power key system has been changed slightly. (articles.orlandosentinel.com)