Arturhra

Black smoke exhaust into high gear and the oil level goes down what the problem help me?

Mrfix

Sounds like your burning oil that is getting past your piston rings (specifically your Oil Rings) and it is burning along with your fuel. This typically means you need an engine rebuild. You could have a mechanic do a wet/dry compression test to figure out how severe the problem is and which cylinders are bad.

Is it an IS250?