just got my engine oil changed at the dealership and they installed the PF48E filter instead of the PF63E which is the one in the owner's manual.
just wondering.. is this like the new type or what's the deal?
Yeah, it's crazy - dealerships are supposed to be the people "in the know" about your car and most don't appear to be any better than Joe Mechanic down the street. The only difference is that the dealerships have access to tons of useful information (TSBs, etc) - but it seems that a lot of them don't use that information to their advantage....
That being said, I don't think it's the end of the world using the PF48 (it's what came on the car from the factory, I believe) - there are TONS of these Impalas on the road using PF48 oil filters. You'll be just fine. Just point this issue out to the dealership the next time you go in (if you return to that dealership). Trust me, they are not the only dealership doing this. In fact, I think the dealership that @1999 White C5 Coupe uses did the same thing to him in the past - same with other members. Unfortunately, it seems to be a common issue.
Confusion on this issue would be a huge understatement. The police version lfx engines still use the pf48. Surprised they continue to list the incorrect filter at ac delco. Had pointed out the same issue several months ago.This whole oil filter mess (and it *is* a mess) is ridiculous. Even if you go to the AC-Delco parts list website, it lists the PF48 as a filter option for the 2012/2013 Impala!
It's not because the engines were lasting too long, the change was done because the engine specifications changed and the 2012+ engines got tighter inside requiring higher oil pressures. See this techlink article for more info. https://sandyblogs.com/techlink/?p=4518I believe that the main difference between all of these filters (besides the size - some are taller than others) is the bypass valve specs. The PF63E uses a 22psi bypass valve and the others use a 12psi bypass valve (if I remember correctly). But when you think about this, all that means is that the "wrong" filters will bypass quicker than the "right" filters. Keep in mind that the bypass valve is only used in rare situations (inital startup if oil is really cold and thicker than normal and if the filter is too clogged to operate normally are the two main reasons that I can think of). Personally, in those cases, I think you'd be better off bypassing in order to give the engine the oil it needs. To me, dirty oil is better than not enough oil. They specified the 12psi spec filter for my 2012 for like 3 years before eventually changing the spec to 22psi.
If you change your oil filter frequently and don't live in Alaska, I highly doubt the bypass valve spec difference will make any difference whatsoever - and if anything, to me, a lower psi bypass valve seems "safer" than a higher psi bypass valve. Again, I would rather feed my engine dirty oil than starve it of oil.
Hell, for all we know, GM changed the spec because the engines were lasting *too* long! After all, they *are* in the business of selling cars! Yes, that is a "conspiracy"-theory type statement and is probably a little overboard, but hey, you never know! Or maybe it was an attempt to deny warranty claims becuase people were using the "wrong" oil filter. Or maybe it was an attempt to force people to buy AC-Delco oil fitlers becuase they are now the only ones that meet their (changed) specs! Obviously, we have evidence of these cars using the "wrong" filter for 150k miles and they are running fine, so I truly don't believe the lower psi bypass valve is a major issue at all.
All of that being said - I'm curious to hear "alternative views" on the subject!