ZR-1DUDE

Since I can’t pick up my ZR1 until next week I am doing the next best thing - reading the online owners manual cover to cover. I am reading on the forum here the recommended oil filter AC Delco PF64 GM part 12640445 has been replaced and there is an on going debate about quality of the new vs old (smaller).

What are people running for oil filters?

First couple oil oil changes are on GM. I’ll be thru the break in period by the time I get home, so it will go quickly.

Thanks.
D.

BearZ06

I'll stay with the recommended PF64 new part number or not.

SouthernSon

UPF64R - ultraguard. Same architecture mostly. Just make sure the oil filter has an orange colored (silicone) anti-drain flapper valve beneath the perforated metal lid. The cheaper filters have the black (nitrile) that can shrivel with heat and not contain the oil. Of course, the slanted filter bosses are where it really makes a difference but I figure cheaper nitrile rubber ones may be indicative of cheaper all over.

Check my post on down the thread. There appears to be controversy.

Ninetres

Just bought a couple PF64s for break-in from the stealership. Lucky I do per diem work for a local shop so I get to use their account to save a few bucks.

BearZ06

The UPF64R has a 35 psi bypass and is what the Chevy Spark calls for

The recommended PF 64 has a 22 psi bypass. Whether or not this matters I don't know.

ZR-1DUDE

Lots of talk about these fine details on the forum.

D.

SouthernSon

From my research (limited, I assure you) the recommended application charts show them to be interchangeable with all models. A 22psi would probably be in bypass constantly.

Here is another thread on the forum. I don't like the nitrile rubber AFBV. The upf64r is designated on some application charts for the C7Z06 but not the ZR1. Could be too new? Anyway, when I called the dealer a couple of weeks back he said UPF64R would be fine. Maybe, maybe not. I think I'll stick with the PF64 from now on until a final word comes down. Besides, I will change the oil often enough to stay pretty clean anyway.

https://www.corvetteforum.com/forums...lter-pics.html

Kracka

And 1.5L Volt engine! My initial concern would be oil flow capacity since its designed for much smaller econobox engines rather than a performance V8.

Hib Halverson

I use the UPF64R on 1878.

Keep in mind that, typically, the number quoted for filter bypass is the pressure differential at which the bypass opens. As the filter becomes more restrictive over time, the pressure differential across the filter increases until the bypass opens.

In theory, you don't want a filter to bypass at all because when it does, some percentage of the oil does not get filtered.

This is why I change oil filters more frequently than I change the oil itself.

Filters, even the UPF64R are pretty inexpensive. I bought a batch of four of them from Rockauto.com

SouthernSon

As I stated above, the UPF64R is approved for the C7Z06. Hardly an econobox engine.

https://www.autozone.com/ignition-tu...94595_923159_0

erick_e

I read that the variable displacement oil pumps on the LT series necessitated the lower bypass pressure setting, unlike the LS series oil pumps which was not variable displacement.

Kracka

AutoZone? Really? LOL
Just because it fits doesn't mean you should wear it

SouthernSon

You post your source for the little econobox application and we'll all see what other applications they recommend for it. Of course, we all know you wouldn't want to do that, right? standing bye.....

Oh yeah, "Checkmate!"

Chance575

I thought I read some where the ultras were just reboxed mobile 1 filters

Ninetres

The “holes” in the top of the filters are quite different.....for better or worse.

https://www.camaro6.com/forums/showthread.php?t=524554

SouthernSon

Yes they are. You should see the openings in the K/N HP 1017.

SouthernSon

Just found this and ordered it. I have used one on a 2007 duramax for 10 years and one on my C5Z also for 10 years. Never had a problem. I like being able to peek inside during oil change, too. Easy to clean and reinstall. They work great.

https://www.knfilters.com/oil-filter...-filter-billet

UnhandledException

You guys are approaching this wrong. I have done extensive research on these filters and my conclusion was that the 22 psi bypass is a deal breaker if you are pushing the car. During high rpm heavy use, that bypass psi difference becomes matter of life and death of the engine. I read engine failures due to this in other forums. I would not risk this to be honest, not worth it.

SouthernSon

Well, I found the specs for the K/N oil filter - 16 psi relief valve. But, the SS filtering does a superb job while maximizing flow in my experience with the C5Z track car. It would take a long time between cleanings to restrict enough for the 16psi to kick in, probably.

https://www.knfilters.ca/search/prod...x?Prod=SS-1017

Rinaldo Catria

Does anyone have any links to reviews of oil filters with 22 bypass for the LT5? PF 64 is factory recommended but aren’t there much better filters available with higher flow, better filtering and also fully synthetic? The more I read the more confused I get.