You could at least give us the answer to the joke.
This is the type of behavior that gets women black eyes.
p.s.: I just figured out the answer
she's a slow learner
LOL
I work at a repair shop. Sometimes my BMW customers ask why everything is so expensive, like the brakes example above.
I tell them that when they go to a repair shop, BMW stands for "Bring my wallet".
BMW is much more expensive than Honda. Not only are the repairs more expensive, but they...
Are you actually changing the oil?
Or, are you just checking the oil and topping it off if low?
If you're just topping it off, it doesn't matter.
If it's only a little low, it will be diluted with the other oil.
If it's very low, then any oil is better than running it low.