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Yes, and no. Now, your question should be "is the M1 filter measureably better than AC Delco, and does a magnet really help"?
Any filter that doesn't have construction problems (looking at you Fram) will work fine. I personally stick with ACD or Wix filters when I can find them. Do M1 filters have tighter tolerances? Yes. Does it make any difference? IMO no.
As far as filter magnets go, if you've got enough steel debris in the filter that you need a magnet to pull it to the side of the filter can to keep from clogging the filter media you've got much bigger problems.
Yes, and no. Now, your question should be "is the M1 filter measureably better than AC Delco, and does a magnet really help"?
Any filter that doesn't have construction problems (looking at you Fram) will work fine. I personally stick with ACD or Wix filters when I can find them. Do M1 filters have tighter tolerances? Yes. Does it make any difference? IMO no.
As far as filter magnets go, if you've got enough steel debris in the filter that you need a magnet to pull it to the side of the filter can to keep from clogging the filter media you've got much bigger problems.
I have used only the PF64 filter on my C7 Z51 and now my Grand Sport for a reason. I'll explain below. However a recent Thread pointed out a need to use it because it has a lower pressure relief spring! With the low oil pressure used with the variable volume oil pump in the C7 the PF64 uses a lower pressure relive valve! Not even sure the "racing" GM filter should be used, let alone an aftermarket.
There is a GM service bulletin referencing the need to use lower pressure relieve spring filters. http://www.corvetteactioncenter.com/...tems-1363.html
My Reason For Using the GM Recommended Filter
I had made and posted a PDF of my oil change in my C6 Z51. One of my product manager who also had a C6 saw the pic on the forum or in my PDF. It showed a Frame filter. He gave me flack referencing reports of filter issues with several brands! I started using the recommended filter since then!
As I recall one of the car magazines had a C7 engine fail and it was attributed to a bad PF64 filter! Since I change my own oil IF I have a problem don't want GM to point to the filter I used! If a PF64 fails and causes an engine problem that will be covered!
In those pictures, it looks like the Mobil 1 filter has a silicone anti-drainback valve and the OE filter has a Nitrile rubber. The silicone anti-drain back is good because it can withstand higher temperatures and for a longer period of time. Both have a Nitrile rubber sealing ring. .
Some filters will have PTFE infused sealing rings or silicone sealing rings. This is nice, but not something I make a main decision maker.
Mobile one produces the UPF any number R series for AC Delco.
The above quote is from another site regarding the UPF versus the PF for our engines. The r version yes can be used on the smaller engines but it is more money and not needed for LT1 or lt4. But it is the superior filter it does not restrict more or slow down rate or pressure if you read the explination above should make more sense to you it's very similar to the Mobil 1 filter for our cars.
in fact I believe it was 2008 or nine somewhere around that time GM started using the UPF 48R in all LS7 ls9 engines because it was the better filter versus the pf48
given that the bulletin shows you can interchange the upf64r with a pf64 should be all the proof you need at the low pressure relief spring is the same it's just a better quality filter with an anti drain back and better sealing ring for higher Temps.
The Mobil 1 filter is constructed a little bit better then the UPF 64R butt they built the upf64r to GM AC Delco spec how they wanted to do it which probably save them a couple pennies for each oil filter therefore it has a bit lesser quality components but it's still above the non upfr series
the only difference between the 48 and 64 has the location of the bypass valve but the numbers in the sequencing of the numbers is the same which started out as pf48 and then the upgraded filter became the UPF 48r
to confuse the matter even further mobile ones filter is still the M1 - 113 which is the same one for the LS3 7-9 excetera. So if the location of the bypass valve is different on the 48 which is also interchangeable with the Mobil 1 M1 - 113 how the heck can we use it? That's why I'll just stick with the AC Delco upf64r recommended by my buddy who puts them in all his LT Motors at his shop
We toured the Wicks Filter plant in Dillon SC some time ago and they make filters for many folks BUT the parts are different. Their automated line makes oil filters at a very fast rate They were making even low volume filters for NASCAR that had to withstand even higher pressures. They use the specified parts to meet whatever spec. What was fine for a C6 LS3 may not be for a variable volume, low pressure (at times) LT1/4.
I believe that the testing that's been done over the years always rates the ACD filter at the top of the heap as one of the tested best. FWIW. I see no reason not to continue using ACD.
We toured the Wicks Filter plant in Dillon SC some time ago and they make filters for many folks BUT the parts are different. Their automated line makes oil filters at a very fast rate They were making even low volume filters for NASCAR that had to withstand even higher pressures. They use the specified parts to meet whatever spec. What was fine for a C6 LS3 may not be for a variable volume, low pressure (at times) LT1/4.
exactly. and that's why the UPF64R can be used in place of the PF64 as the bulletin states in reverse. the internals of the UPF64R are superior as is the construction and temperature tolerances and why the preferred filter is the R for those engines which for some reason require better filtration and higher temp tolerances.. should speak for itself. the PF64 is "acceptable" for our cars and equates to GM (Good enough Motors). you change your oil at the 7500 mi interval? it's acceptable lol...
exactly. and that's why the UPF64R can be used in place of the PF64 as the bulletin states in reverse. the internals of the UPF64R are superior as is the construction and temperature tolerances and why the preferred filter is the R for those engines which for some reason require better filtration and higher temp tolerances.. should speak for itself. the PF64 is "acceptable" for our cars and equates to GM (Good enough Motors). you change your oil at the 7500 mi interval? it's acceptable lol...
Are you sure the UPF64R that is designed to handle high pressure, which the LT1/4 do not have, has the low pressure relief spring that is to be used with variable volume oil pumps that started with the C7?
You see the Box you see the filter it says racing right on it you think they made that specifically for an equinox or Regal LOL they using the same numerical enhancement the better filter just like they did for the 48 I'll have to dig for the same information and post it up but these filters have been dissected and gone through the only difference was a better filter material and seals
You see the Box you see the filter it says racing right on it you think they made that specifically for an equinox or Regal LOL they using the same numerical enhancement the better filter just like they did for the 48 I'll have to dig for the same information and post it up but these filters have been dissected and gone through the only difference was a better filter material and seals
I agree, better filter material, strong case BUT does it have the lower pressure relief valve that is in the PF64. That is what that 2017 bulletin is all about. Sure it can handle higher racing engine pressures but that is not the issue with the new variable volume oil pumps as in the LT1/4. My Grand Sport pressure gets as low as 25 psi.
The LS3 in my Z51 C6 did not use that type of pump. It started with the LT1 and is computer controlled.
^^^
Read the service bulletin. If you have a variable volume pump it operates at times at very low pressure. You are far better IF the filter for whatever gets clogged to bypass the clogged filter and at least have oil! There is a pressure drop across a filter.
Why would you want a low pressure bypass spring? Basically allowing unfiltered oil to bypass the filter.....
Even if you had unfiltered oil from time to time it wouldn't be the end of the world, that oil would just get filtered on the next pass through the filter. Even if the filter is only actually filtering 50% of the time your engine is running, it's not going to cause excess engine wear. Under higher rpms I'd rather have a steady flow of oil, whether it's filtered or not. Other than in racing applications, these engines aren't going to spend all their time at full throttle, so the oil will get properly filtered under lighter to medium throttle conditions.
Damn it. We need answers I don't know how to find them. Somebody on here has to know somebody that works at easy Delco or for some Oil Filter Company Etc I'd love to know my friend and I have been running the are filter in our lt4 without issue for about 1300 miles I've noticed no difference in the world pressure temperature excetera excetera I guess if what you're saying it's just a low pressure bypass valve I couldn't see why they wouldn't put that in the r filter?
For those interested this is what is in the C7, both LT1 and LT4. It's called a variable volume oil pump. The computer defines when high volume is not needed like at idle or when cruising at under ~1500 rpm and not demanding power, assume when manifold vacuum is high. It moves the multivane pump outer casing to reduce the volume of oil pumped saving energy. We see that as lower pressure.
Have no fear the rod and crack bearings just need oil volume they generate their own pressure when rotating, at times over 3000 psi!
07-07-2017, 09:16 PM
Mobil 1 oil filter vs AC Delco
