mobil 1 extended performance 10w 30 always with mobil 1 filter or bosch dirt filter. change ever 4k hard... and i mean hard miles. ive had my oil anylized too and found that my engine is clean. also id just like to clarify that should you ever go from synthetic back to conventional you can do this. ive been told by many that doing this can cause problems. well im here to tell you that is false. just fyi incase you cant afford your normal oil.