My brother’s 1998 Nissan Altima (KA24DE engine) has been leaking a good bit of what looks to be oil. I’m not mechanically inclined, so I call upon the collective brain that is Oppo. If it is oil that is leaking, it’s not a substantial amount as there is still plenty of oil left as indicated by the dipstick. The engine sounds normal and using a bluetooth OBDII reader, it showed no current or pending codes.