Synthetic blend is not what the car is intended to have, a true mobile 1 'euro spec' oil is what is called for, nothing less. As stated, will cost you about $60-$80 for the oil and filter alone.

Change your oil when your FSS tells you to (depending on driving style and conditions, usually around every 7,500) and if you do not know what FSS is, please search and you will be happy you did.

I would get that crap out of my car asap if I were you, a lot more important to have good oil than to clean the MAF IMHO....