I have to get my oil changed today but ran out of the 20004 filters more are on the way but won't come in time have to change it today. Would it be ok to use my 20004 filter that i have on there now or it would be a waste to change the filter at all with an old filter. Or if i have to buy 1 at the store which would u recommend Mobil 1? Since the 20004 is such a great filter could it last 2 oil changes? Thanks