My car misfires every few weeks - why does one spark plug always get oil on it?

Every few weeks I have to take the same spark plug out to clean oil off of it because it starts misfiring. Could you please tell me what the problem may be?

Do I really need new spark plugs and fuel filter at my next service?

My 2019 Honda CR-V EX is due a service. It's done 53k miles, being serviced regularly. The franchised dealer recommends replacing the fuel filter and the spark plugs. I've used Shell V-Power fuel since...

How often should I change the spark plugs on my car?

I have a 30,000 mile 2018 BMW X2. How often should I change the spark plugs ?