Originally Posted By: Sayjac
Agree with the OP first sentence and the Grit in the can dome would confirm that. Engine likely looks similar. Neither oil nor filter intended for that oci/fci.
Wondering how long it took to complete the 14-15k? Moisture condensation cycles can/will take their toll on cellulose media especially so pushed to this length. This result an example of an oil/filter combination generally intended 5-6k miles, going well beyond that. I'm not shocked by the results.
Thanks for c&p.
This was about a year. A majority of this OCI was my ex doing a 35mi (each way) commute.
Originally Posted By: dnewton3
I would ask why the Wix XP? Their own data shows it's not a really efficient filter. It's good for long OCIs, but it's not anything to get excited about, at least in terms of their claimed beta data. Consider at Fram TG. High efficiency, decent capacity, and a reasonable value.
And as to the syn ... why? It's not going to clean up much of anything more than any decently dosed dino lube. Ca is Ca, Mg is Mg, overall. The detergents in quality dino lubes is every bit as capable as a syn, especially for a 5k mile OCI.
I work at an auto parts store, and employee price of Wix and Wix XP was less than $1 difference if I remember right, and I figured the extra capacity might be helpful. I'll be using a regular Wix in the future. As for the oil, it's just had what I had bought on clearance, sure, it's "overkill" and "wasteful" but I don't really care since it didn't cost me any more than conventional would have.
Originally Posted By: WobblyElvis
Aren't filters warrantied to last the interval as set in the owner's manual? Many vehicles on the road today call for a 15,000 mile filter change interval. This filter should not have failed but business is all about the bottom line.
Sure, MicroGard filters have a one year warranty, but the filter being used outside the "factory" OCI would surely void that warranty. There is nothing wrong with MicroGard filters for a traditional OCI, not 15K. This GMC does have a "Change Engine Oil" light, which I'm sure has been on for over 10k miles at the point I got the vehicle back. If the oil/filter would have been changed at the point that light came on it would have been totally fine. Besides, if you look at the other applications for a 51522 filter, all of those applications probably have 3-7k factory OCI recommendations.