CRG517

Whats the verdict on the correct AC Delco Oil Filter for the Z, is the PF48R required or is the PF48 OK? I checked Wal-Mart and Advanced Auto and cannot find the PF48R, should I keep searching or just use the PF48. My car is an 2008 if it matters.

tim414

Your owners manual likely calls for PF48 because you have a 2008. However,

around the time ZR came out. (to standardize?) they changed it and now (in 2010) calls for UPF-48R Delco filter. This one stands higher pressures of the LS9 power plant.

There was a earlier thread and was the consensus that PF-48 filter called for in your owners manual will suffice. Will it be ok to use either one? YES. I have the '10 and use the UPF-48R (because my owners manual calls for it).

So...use either one since your owners manual calls for the earlier one. The latter (UPF-48R) exceeds the earlier so it WILL work in your 'Z.....

oh yeah, I ordered a half dozen from GM Parts House here on forum. Came to my door in 10 days. Tim

Add: The Z06 in later models (09-xx) has a larger VOLUME reservoir. It does NOT have a higher pressure oil pump than it had originally. Some guys think since GM power train changed the owners manual to call for the UPF-48R that the Z06 has higher oil pressure than it did originally. Some also believe that the Z06 got the oil pump from ZR1. WRONG.

The Z06 has the SAME oil pump it originally started with. GM power train only updated owner manuals to standardize....My 2010 Z06 has the SAME oil pump the 2006 Z06 has. ONLY the VOLUME of reservoir changed. That's ALL. Too many mis-beliefs and MIS-information.

rws.1

you can use either.
I also buy the UPF 48R from Gene at GMpartshouse. 6/box

Rob Willis

What's a case of 6 run shipped roughly?

Luweegy

Walmarts store brand is a WIX filter.They make GM's filters.I've been running them for yrs.

fmarshall

I always recommend buying one of each, cutting them open with a hack saw and inspecting the innards. All filters are not alike.

WIX makes filters for a lot of companies. Despite the manufacturer and similarity in part numbers, not all internals are the same. YMMV.

It would be a surprise to me that AC Delco filters are made by WIX. It has been my experience that WIX filters are of a better quality than AC Delco, application to application. I have cut several of them apart over the years.

In the case of a UPF48R, however, I would be more concerned about the thickness of the filter wall and burst strength, as the 2009 engines with the 10.5 quart tank also have a higher pressure pump and run a higher oil pressure. And, personally, I would not trust just the same look and fit of a filter to protect my engine.

Most all filter manufacturers will warrant their filter and pay for any damages that their filter causes, should it fail. But, I would much rather not have to go down that road, believing that a GM filter will carry a truly no hassle warranty.

GOLD72

I was not aware that the 2009 and later LS7s had higher pressure pumps than the 2006-2008. I guess I am doubting that. I think you are implying that the later LS7s got the same oil pump as the LS9s. The first years of the LS7 certainly were running higher oil pressures already above the LS2 and LS3s of the same time period and required a higher range dash pressure gauge.

AFVETTE

Hell my oil PSI's on my LS7 built in Dec 06 have exceeded 100+ PSI until my oil temps reach 130+ then they are in the 50+'s at idle and as high as 70's under load. But I've been using the PF-48 even on the track w/o issues.

Are folks saying they are EVER HIGHER on 09 and UP LS7/LS9's???? That's insane.

Tom

9C1

Insane or not higher oil pressure is a fact for 2009 and newer Z06. As stated, it (the higher maximum pressure) goes along with the larger capacity sump introduced at that time. Some of the track guys were having issues with oil starvation with the earlier set-up in high-G turns. The higher pressure was Chevrolet’s way of “fixing “ that. When the LS9 came out the LS7 got the same oil system as the LS9, and thus the requirement for the PF 46R.

At the time there were lots of threads here on the subject.

3LZZ06

First I've heard of this.

The oil pumps have not changed in the Z06. Same oil pressure, just a different capacity...

The change in recommended filters is just to consolidate parts. Either oil filter can be used for the LS7/Z06.

LanceFitzgiben

I think when he says "the same oil system as the ZR1" he is talking about the larger capacity of the system on newer Z's. I installed a LPE oil tank and they say to use the new filter.

9C1

Thanks to Overdrive on 3-18-2011 in this thread:

http://forums.corvetteforum.com/cana...l-filters.html

"GM’s HIGH PERFORMANCE - HIGH PRESSURE OIL FILTER IS BACK
Members, Here is the latest news that we have learned from GM Powertrain.

"GM Powertrain has released a new oil filter for the 2009 Corvette. The new design UltraguardTM Gold UPF48R oil filter will be used on the following OEM applications:

"Z06 - LS7 7.0L and ZR1 - LS9 6.2L

"According to GM, this filter was designed with the following in mind: “With the addition of piston oil cooling nozzles and other unique lubrication system requirements, a new design dual-rotor oil pump is required for the LS9 application. The new design oil pump produces greater volume and higher system oil pressure. To meet those requirements, a new oil filter with higher BURST strength is required.

"The UltraguardTM Gold UPF48R filter (U is for Ultra and R is for Racing) is black in color, has a thicker exterior shell and can be identified as GM part number 12626224. The internal components are the same in both the UPF48R and the PF48 oil filters. The UPF48R can be used in applications where the PF48 is specified.

"GM requires the UPF48R for the LS9 application and is also used for the LS7 application as both engines are built at GM’s Wixom Engine Performance Build Center."

He cites: http://www.c6registry.com/Hot_News/archive/dec08.htm as the source of that quote. It (the quote) is dated October 15, but it is less than clear what year it is. My best guess is 2008, but it could be 2009 -- it is hard to tell from the News Archive.

Terry

Dirty Howie

Doesn't say the LS7 gets the same oil pump as the LS9. Actually, the reason stated is that both engines are built at Wixom ........


DH

LS6-M22

FWIW the mobil 113 filter is the exact filter as the UPF48R. Same manufacture just different sticker.

3LZZ06

Exactly...

The only reason for the higher pressure oil filter (UPF48R) was for the additional oil pressure in the LS9. The LS7 retains the same pump as in previous year LS7's but with increased oil capacity.

The PF48 (original LS7 filter) still applies for the Z06 but you can use the UPF48R also...

GOLD72

The LS7 oil pump has never changed to my knowledge. The LS9 has a different pump which is both higher pressure and higher flow. A lot of misinformation has been posted over the past year or more regarding required use of PF48 vs UPF48R. GM/Wixom made a supply chain management decision for MY2009 to stock only UPF48R filters for the LS7 and LS9 engine builds and that carried over to the LS3 dry sump engines starting in MY2010. GM likely promised the maker of the UPF48R filters (Champion Labs???) a population of engines using the UPF48R to ensure their interest in continuing to make them. The population of LS9 engines alone will be quite small. The installed base gets a lot bigger if you add LS7 and LS3 dry sumps to the population. JMHO.

GOLD72

Most likely Champion Labs.

Prime Target

Mobil 1 113 filter. I've been using it since my cars first oil change.

CrystalRedZ07

Same here!

AFVETTE

Finally the truth.

Tom