oil smells like gas !
 

1997 Nissan Altima GXE 4 cyl. Had the intake gasket replaced 6 months ago. Also replaced one fuel injector. NOW the checkengine light is on. Did an OBD reading, it said the fuel mixture was too lean. I smell exhaust and the oil smells like gas. It idles very rough at stop lights but I can take it on the highway no problem. Nevertheless it's parked right now. I've got $178,000 miles on her.
Any help or suggestions would be appreciated.. TIA