changing the oil in a CR-V tomorrow for my cousin, i do all the maintenance on my familys vehicles. last time i changed it, i put Pennzoil Conventional 5w20 and a Purolator P1 filter. she just called me today, said her oil life is at 40%, but that she put 9,000 miles on it since the last time i changed it. going to change it tomorrow, was thinking of using Pennzoil Platinum 5W20 and a Fram xtended Guard 7317 filter. would using synthetic oil and the fram XG filter be more suited to a 9,000 mile oci? does not sound good to run Pennzoil conventional for 9,000 miles. should the fram xg be good for that oci?