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Author Topic:   What do you guys recommend for oil filters?
posted May 07, 2002 09:32 AM
I read somewhere there is a good cheap AC Delco filter to use, but now I can't find it. I am looking for a good filter for not a ton of $$$ to use on a street stock. Also, is they System One filter a good investment? How long is it good for?


posted May 07, 2002 09:37 AM
Napa filters are what I have always used. My dad always used them too. NOT ONE PROBLEM!!! They are made by wix and reasonably cheap

posted May 07, 2002 11:26 AM
I think the blue ACDelco filter is the one you are talking about and yes i have heard they are good filters.

I would choose either the Delco or a Wix. Keep in mind that Wix also makes NAPA filters and PartsMaster (O'reillys) and these are usually a little cheaper than a WIX.

We use WIX racing filters but they are $8-10 ea compared to $3-4 for the others. They dont filter as tiny of particles as the standard filters but they flow oil with less restriction. Which works fine on race motors as long as you keep you oil in good shape. We have never had any problems with them or wear associated with dirty oil.

I personally would not run a FRAM. I have heard of too many of them collapsiong and causing a restriction. Just my opinion though.

I think the system one is worth looking at. I know some people who have used the same one for years without problems. I think they are around 85$ so by the time you buy regular filters all year you could probably have the System 1 paid for plus you can take it apart and see whats in it. We have our filters given to us other wise I would seriously look into a System 1.

[This message has been edited by dirtbuster (edited May 07, 2002).]

posted May 07, 2002 12:45 PM
I was told by an engine guy that the system 1 filter only filters down to 60 micron effectively (about 3 thou - which is bearing clearance size) so i'm not 100% sure if i would change to one myself.

posted May 07, 2002 01:04 PM
I personally use the FRAM HP4 racing filter. I have never had a prob. with it. but that's just my oppion though.

posted May 08, 2002 09:11 PM
I use hp4 fram myself.. Fram is the only filter I will use...My uncle runs a 421 late model motor that was set up for a dry sump and he switched it to a wet sump and has not had a problem.

posted May 08, 2002 09:26 PM
i have always used the ac pf35 or the parts master ones last week i went to the local bankrupt k-mart and get the ac's for $1.75

posted May 09, 2002 08:13 PM
I've had loads of trouble with filters recently (i run the oil bypass blanked off so that all the oil is filtered). We used to use Fram a long time ago but then we had a couple collapse so stopped using them. We then switched to Purolator and used these to good effect for a long time until a couple of weeks back (we changed the oil/filter and started it up and had very little oil pressure). We thought it may be the filter so fitted another one, only for the oil pressure to be worse! We then fitted an AC filter -on recommendation- only for this to give the same result! We then decided to try a K&N filter & suddenly the problem had gone!!
So in conclusion: i would say that if you run with the bypass blanked off make sure you run the best/most consistant filter you can afford (remember its always the cheap bit that lets you down & destroys the expensive bit)....and if you run with the bypass in place theres a chance that very little oil is being filtered (the bypass can open as low as 5 PSI) & you are just paying for a replacement oil bung & a pint of oil every time you change it!
PS if you do a search for oil filters you may find a study a guy did on them. Some of his findings were shocking....seals missing,rust inside! ect...
We now have a known test filter for when we build engines so that we can run the oil pressure up with a drill whilst still on the engine stand (well it saves dragging it out again later if there any faults show up).
Hope this helps a little.

Tom Asmus
posted May 10, 2002 06:54 PM
I run a FRAM HP1, mainly because the can of the filter is so tough and is hard to dent or get tore open by a rock or debris!

posted May 10, 2002 06:57 PM
Tom I'm guessing you drive a ford.

posted May 11, 2002 02:14 PM
I have been running the same System 1 filter since 1994. It is the best filter investment you can make in my opinion !!
The actual filter rating is 35 micron but will trap particles below 10 micron. Wix filters are rated at 19 micron. If you are wanting to stay with a paper element filter I would only use a Wix filter.
What makes the Wix filter a good filter is that it has more paper media then a AC/Purolater/Group7/Fram. The other good point of the Wix filter is the bypass spring. On top of the filter element,Wix uses an actual coil spring where the other brands mentioned above use a flat spring plate to control the bypass pressure of the filter element. If you have never cut open a Fram filter you would be amazed on the cheap construction of this filter. Fram use's cardboard end caps on the element and instead of glueing or epoxing the filter element seam they use a piece of STRING!!!
Now this is on the standard Fram filter, I have not opened up one of the HP filters so I cannot comment on those.

posted May 11, 2002 06:32 PM
I saw an article in one of the racing mag. a while back about a plastic bypass valve melting in oil filters. They would'nt say which one though. Anyone know how to tell which ones have those?

posted May 12, 2002 11:50 AM
Wow...great replies guys. As for the System One, I have now heard two different stories about how much they filter. Can anyone tell me for sure? They seem like they would be a good investment for the money, but I would like more opinions on them. Thanks, and keep the replies coming.


posted May 16, 2002 03:10 PM
The information I posted on the System1 filters is directly from System1. I had e-mailed them and that is what they had e-mailed back.

posted May 17, 2002 11:38 PM
Merlinmech, it was a Fram filter. It cost us an engine when the plastic part came loose and stopped the outlet flow. Fram wasn't interested in helping us with our problem. Guess what kind of filters I recomend that one should not use.

Granted all Frams don't have the plastic check valve. We found this one by shacking the filter after removing it after losing the engine. I wonder how many engines are lost this way and the filter thrown away without knowing the cause? SLEEPY

posted May 18, 2002 07:17 AM
With the incosistant quality of filters out there would it be better to just run without one & just change the oil more often?
PS. I was told there are only 3 companies in the U.S that make filters. One of them can be found at .

posted May 27, 2002 11:36 PM
Our motor man suggested using a FRAM PF1218
for our motor it has check balls in it to prevent drainback.We've ran them for 3 years and never had a failure.

posted May 29, 2002 11:13 PM
Thats my opinion too. The FRAM HP series filter may be alright and I am sure it is better that the regular filter but if they are not going to put together a decent filter for my street car I am not going to spend money for one of their race filters.

WIX or Delco for me.

posted June 03, 2002 10:15 PM
I have personally seen 4 Fram HP4's implode and ruin engines . But Fram covered all 4 engine's , and paid in full the claim filed with there claim department . They sent an actual insurance adjuster to my business , he looked at the damage , and did not argue the fact that the filter caused the problem . The key to getting your claim filed and paid for , is to only take a photo of the damage caused , and of the mess inside the filter to send in with your claim form . DO NOT SEND THEM THE FILTER !! If you lose an engine due to the filter , it is best to take it to a machine shop (like was done with the 4 that I saw), and have them give an estimate , and help you with your claim . Also , and this is key to your claim , if your using a plugged bypass in your filter housing(like it should be) , bolt a stock unplugged one on the engine before taking your pictures , and before the claim adjuster arrives . Fram will not cover any damage done by one of there filter's , if the bypass is plugged .

BTW , we use Wix racing filter's , or the OBERG external filter .


Hendren Racing Engines
Rutherfordton , NC

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