Toyota piston rings are seated from the factory.I have an 07 Yaris with about 2400 miles on it... and whenever I check the oil, I can smell gasoline on the dipstick(mixed in with the oil)... I noticed this when I first got the car, and I figured it was just blow-by in the cylinders due to it being brand new...(because the piston rings hadn't seated yet) but it's been a while and I can still smell it. Will this ever go away, and is it cause for concern?
All engines have BLOW-BY to some extent, thats why they have PCV systems.
Gasoline was once oil in a different form, both products come from the same source. They are just different foods in the same chain.
Yes it will probably always smell like that and as long as the engine light is NOT on and you feel it runs fine, there is no cause to worry.