AC Delco filter questions

[gmctodd]

I was considering the ultragaurd UPF44 for my 6.0L, but read somewhere that the duragaurd (standard) PF46 filters to 10 microns and contains both syn. and paper media.Is that correct? Is there any other benefits to the UPF44 that I am missing?

If so what about the PF61? Does this 10 micron standard apply to all duragaurds? At Walmart the new book lists the PF61 for my truck instead of the PF46. They appear to be the same other then length and the PF61 does not have a ADBV.

The lack of the ADBV should not be an issue based on instalation on this engine, correct? would the lack of the ADBV offer better flow, ie, less restriction? My GF's envoy uses the PF61 and it would be easier to keep one filter on hand for both.

Thanks

 

[aquariuscsm]

What exactly is an anti drain back valve? Any pics of one with and one without?

 

[GMBoy]

Originally Posted By: gmctodd
I was considering the ultragaurd UPF44 for my 6.0L, but read somewhere that the duragaurd (standard) PF46 filters to 10 microns and contains both syn. and paper media.Is that correct? Is there any other benefits to the UPF44 that I am missing?

If so what about the PF61? Does this 10 micron standard apply to all duragaurds? At Walmart the new book lists the PF61 for my truck instead of the PF46. They appear to be the same other then length and the PF61 does not have a ADBV.

The lack of the ADBV should not be an issue based on instalation on this engine, correct? would the lack of the ADBV offer better flow, ie, less restriction? My GF's envoy uses the PF61 and it would be easier to keep one filter on hand for both.

Thanks



I'm being 100% honest and sincere when I say this -- do yourself a favor and NOT use the AC Delco filter. I had not one - but 3 AC Delco PF46's on my 6.0L (Sierra Denali 2006) fail me. I wrote about this a long while back. Anyway - same thing happened everytime - around the 3-4k mile mark you'd start the truck and ZERO oil pressure. If you gunned it, them suddenly the oil pressure would return. Once it started it would happen every startup cold or warm. Once I changed the oil filter - problem gone. So i beleive they have cheap or some poor ADBV design. I have since used Bosch and Mobil 1 filters beyond 5k miles without issues. I used to use AC Delco exclusively but not anymore. The 1st time a filter failed I thought oh well. The 2nd time I thought I may have engine problems, but the 3rd time did it - esp when problem suddenly went away with changing the filter and that no other filter does this. Oh and the 3rd time it happened I was 3 states away towing my RV and I just changed the oil filter on the lot - not the oil so you can't blame the oil, which I use Mobil 1.

Just my experience! Stay away from the Delcos - atleast the 46's.

 

[Buffman]

I have no issues with PF52s, standard or Gold, and I've run 30-40 of them

 

[postjeeprcr]

Originally Posted By: gmctodd
I was considering the ultragaurd UPF44 for my 6.0L, but read somewhere that the duragaurd (standard) PF46 filters to 10 microns and contains both syn. and paper media.Is that correct? Is there any other benefits to the UPF44 that I am missing?

If so what about the PF61? Does this 10 micron standard apply to all duragaurds? At Walmart the new book lists the PF61 for my truck instead of the PF46. They appear to be the same other then length and the PF61 does not have a ADBV.

The lack of the ADBV should not be an issue based on instalation on this engine, correct? would the lack of the ADBV offer better flow, ie, less restriction? My GF's envoy uses the PF61 and it would be easier to keep one filter on hand for both.

Thanks


To contain both it is a blend, synthetic fibers to enhance the paper filter. It is not like this section is synthetic and this section is paper. The UPF44 is a full synthetic media, I think the UPF44 would work very well for you. Many corvette owners use that filter.

 

[labman]

In the 10 years I had my 92 Grand Am with the HO Quad 4, I don't think I ever ran anything but AC's, usually the PF 47, but also the oversize PF 52. Ran them on my daughter's Barretta too. Much of that time, I was able to find PF 1177's for my truck. Never a dry start.

They have half again as much filter area than other common brands and I never saw a construction fault when I cut one open.

 

[ThirdeYe]

I use the oversized PF-52 on my mom's Malibu and I've also used the PF-47, never had an issue with them. The PF-52's I bought even have a silicon ADBV

Great bang for the buck!

 

[cronk]

I must have ran 40 or 50 filters on the old S10 I had, I always ran pf47's. Never any issues, my oil seemed to stay cleaner longer than with other filters I had ran in the past. The filtering media on the Delco filters is top notch!

 

[gmctodd]

both my vehicle's use the filter in a vertical position, so the ADBV isn't an issue. The PF61 doesn't even have one. So I'm wondering what effect that has on flow?

 

[GMBoy]

Let me reclarify my earlier post about the c rappy AC filter. I was referring specifically to the PF46. I've used hundreds of AC's in the PF51, PF52 and others w/o problems. Just the 46 I had the SAME problem 3 times. Now that I'm not using them anymore I've gone over 20k miles on other filters with out the issue I got with the Delcos. I'm just convinced there is some issue with that filter. I just can't trust them anymore.

 

[Nyquist]

Originally Posted By: gmctodd
both my vehicle's use the filter in a vertical position, so the ADBV isn't an issue. The PF61 doesn't even have one. So I'm wondering what effect that has on flow?

Are you sure you're looking closely? Every PF61 I've purchased for my Malibu has had one.

As for the quality of the ACDelco filters, I've had nothing but great experiences.

 

[killagt]

I look and look and compair to ac delco, look like it cheap made, and it alway look dirty.

 

[steve20]

I'm with Texas.
Took a 51 off the 95 Corvette last weekend. Opened the filter and I usually use a razor knife to cut the filter media so it can be taken out and unfolded. With this filter, I could tear it apart with my fingers-no need to use a knife. Purchased at Wally's in Greensboro-it was either old stock or just plain ker-app. Filter was only in 9 months and 1000 miles, I was anxious to fill it with the Amsoil I ordered in the Fall

Steve

 

[killagt]

I do stick with pure one filter and be done with it.