I can't seem to figure it out. I just bought it couple weeks ago.

It's a 2008 G37S w/ 46k miles. Just changed the oil and filter. It looked pretty dark. Also filled it up twice with 93 octane w/ fuel cleaner. Intake filters need changed out but I have a Intake ordered.

Is this common and normal? Everything seems fine. Idle, Acceleration, Power, No codes. Maybe small exhaust leak?...That's all I can think of.

 

hard acceleration = more exhaust fumes

 

Typically normal!!

Make sure the catalytic converters are still there!!

 

^ What he said.

Also make sure your engine is fully warmed up before doing any hard acceleration.

 

I always get engine smell after beating the crap out the the engine going uphill...