[Kev0607]

All engines have slight blow-by, gasses that escape past the piston rings and flow into the crankcase where they mix with the oil. When you start your engine cold, the computer commands a rich mixture and some of that fuel doesn't burn and ends up in the crankcase.

If you drive short trips and never get the engine hot enough to evaporate that fuel, you end up with a petrol smell in your oil.

Although, petrol in the oil isn’t good. Your engine needs lubrication that only the oil can give.

Needs a service (oil change) and a good drive. That’s the cheapest option at first. If it still smells like petrol after new oil and a decent spin, something else is wrong. Likely injectors, which can’t be tested by simply looking at them.