CFeria

Trying to buy a few oil filters for my 2018 C7 with wet sump. Think its 7qt capacity.

Have checked Amazon, Advanced auto and Autozone cant find definite answer, but think its the AC Delco PF64?


Have to order from Amazon as I have an unused gift card there.

Thanks!!!

Oskee

Came across this.

GM Service Bulletin # 17-NA-157

its info on spin-on oil filter replacement.

very interesting !

nuke_1

Page 309 of the 2018 manual from the Chevy website;
Part GM Part Number ACDelco Part Number
Engine Air Cleaner/Filter 23107355 A3191C
Engine Oil Filter 12640445 PF64
Passenger Compartment Air Filter Element 22862632 CF139

vettetwo

After exhausting all sources of information, read the Owners Manual!!

CFeria

thanks for all replies, want to mention reason I posted was I think I left manual at dealer
when I picked up the car, had so many papers to sign and keep copies of! Realized when I came home I wasn't able to find manual! Do remember salesman brought it out with the keys! Think I may have left it on his desk as I was in sort of a hurry! But thanks all!

JerryU

Was very interesting! For those that don't want to Google here is a link:
http://www.corvetteactioncenter.com/...tems-1363.html

Noticed the oil pressure in my new Grand Sport can even be lower than my C7 Z51. However this GM memo says because of the "Variable Volume Oil Pump" with it's low pressure at lower rpm and less engine load, the pressure relieve valve in the "specified" oil filter is set lower! Helps justify that I only use the oil filter specified in the Owner's Manual.

DETAILS: Investigated the "Variable Volume Pump" and it's not just decreasing pressure it actually adjusts the pump configuration with a computer to reduce the pumped volume under certain "low load" conditions for greater energy savings. See pic below is of simple system that varies the pump volume controlled by a computer.




Note, it's not just controlling a bypass passage around the pump (like the normal max pressure spring) it changes the pump volume to maximize energy savings.

LIStingray

Oskee & JerryU - I am a little lost: the GM memo says the new design pump was first introduced in 2012?
It seems there is nothing different internally about the LT1 since introduction in MY 2014; and further that the PF64 is still the filter to use for the MY 2018 LT1.

danh63

I thought I did the same thing only to find the manual in the little compartment in the back

JerryU

If you look at the bulletin it does NOT list the LS3 C6 engine as one having a variable volume pump. My '08 C6 with it's LS3 engine did not vary pressure based on the computer. The LS3 was introduced well before 2012 and the first Vette to use variable volume was the C7, LT1.

Lots of questions on the forum about the "low oil pressure" in the LT1. LT4. Both engines are listed. My pic shows how it works.

Oskee

JerryU You are correct My C6 LS7 was the same way also great picture of the pumps by the way !

vettetwo

Interesting that the Mobil1 filter recommendation is the M1-113. However drilling deeper on the Mobil1 website finds the following:
M1-113 M1-113A Buick, Cadillac, Chevrolet, GMC (2007-16), Chrysler, Dodge, Jeep (2007-16) (AC PF48; GM 89017524)

With that detail, the M1-113 may not have the proper 22 PSI Bypass needed for the LT1/LT4.

I will call the Mobil Oil Filter Hotline tomorrow and ask about compatibility with the PF64.

Z51Fan

This is interesting. I was in O'Reilly's tonight & asked them to look up the specs for Mobile 1 M1-113. Their info showed bypass for M1-113 was 11-17 psi. They did not have any info for M1-113A. I have no idea if their info is correct.

vettetwo

Spoke with the Mobil1 Oil Filter Hotline (800-882-0890) which was answered as Champion Laboratories.

I asked about Service Bulletin #17-NA-157 and the Bypass Valve Opening Pressure Specification of 22PSI for the PF64 vs a possible lower rating for the M1-113 Mobil1 Filter.

The individual said the reading may be effected by the manner in which the test is performed. They build the PF64 filter to GM specifications and the M1-113 to Mobil1 specifications and felt there might be a slight difference in the Bypass Valve, but would not comment on the opening pressure specification. The M1-113 specification is 17PSI in the manner in which they do the test.

I gave him the Service Bulletin number and he said he will obtain a copy of it. He could not comment on the intended "target" for the bulletin, but they stand behind the Mobil1 filters with their Warranty:
This is a better Warranty than most aftermarket parts.

Bottom line is the consumer must be comfortable with the parts used for their vehicle.

JerryU

Hmm, being very familiar with regulator design and pressure difference with small spring and orifice sizes, I would be concerned unless comparative data was available.

The reason I use only the GM specified filter is interesting! On my C6 I made a PDF of my oil change and one of my Product Managers (BS & MS in Engineering) who also had a C6, saw the pic with the Fram filter I used and gave me flack! At the time I thought all filters were about the same.

Since I have done all my own oil changes in my C7, Z51 and the first at 500 miles in my Grand Sport wanted to have receipts that showed the proper GM product-just in case! There have been reports of some filter failures, as I recall even with an OEM filter by a car mag doing a C7 test. If the OEM filter fails-for the few dollars more on Amazon, covered!

This lower pressure bypass valve makes it even more important IMO. Was unaware of the issue but was the low engine oil pressure-makes sense!

We toured the Wicks filter plant and they make filters for many brands. They make special ones for NASCAR with their higher pressures (or at least what was higher pressure!) That was several years ago. Have to schedule another tour for our society meeting and ask!

the blur

What's the difference with Mobil 1 adding on the A ? I see reference to Mobil 1 Oil Filter M1-113A. This came up when I googled 2017 GS oil filter.

vettetwo

The "A" suffix Mobil1 filters are built with the higher Bypass Valve Opening Pressure Specification GM is now specifying. The manner in which they regulate the oil pump volume with new engine designs rather than regulating by pressure as in previous designs.

the blur

Would you feel comfortable using the M1 A filter in place of the PF64 ?

vettetwo

Absolutely, I have always used the M1-113A in my 2014 LT1.

I use Mobil 1 filters in all of my vehicles, always with the "A" suffix.

JMII

If you dig around here you'll see mixed responses regarding the by-pass pressure for M1-113A.
I used it for my first oil change with no issues, but then moved onto the Wix WL10290.
More reading: https://www.corvetteforum.com/forums...-vs-pf64f.html

sjw91

That is incorrect. They added "A" to all their filters when they went from 15k to 20k OCIs. The bypass valve is still unknown. Mobil gives different answers to different inquiries. It's still the same filter listed for C6s, which take a PF48 with the lower bypass valve pressure. So the M1-113A is wrong for one of these engines.