Some years ago when I bought my car and was new to the scene i had my engine light come on. I ran my car on super unleaded ever since and after a couple of tank fulls the light went out and has never come back on. Now its been years without it. Obviously it could be something more serious so you definitiely need to check but when my checks found nothing concerning that is what I did. And as of yesterday I got my car back from service/mot/taxed so back on the road. Therefore apologies to all for the rain we have had since!