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Old 05-11-2012, 03:53 AM   #1 (permalink)
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which oil filter?

it may look a dumbass question, but which filter to choose?
I know I have to stay away from the FRAM PH5, but wether it is ACDelco or AmsOil, or Wix, which one to choose? Full flow? with or without anti drain back valve? and what is this anti drain back valve for?

1994 full size BLAZER aka Caramel (sold)

but still linked to 6.5l world
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Old 05-11-2012, 04:07 AM   #2 (permalink)
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I use Bosch, They are good resonally priced filters, AC delco? Used to be good but now not much better than Wall mart Tech 2000, Both made by Champ filters.( Better than Fram IMO).
Wix, Napa gold are excelent same filter. Puroilator is also very good.
If you have an oil cooler you must have an anti drain back valve filter. Never use FRAM. Their anti drainbaak valves are poop.
AMSOIL.?Good stuff if you want to pay for it. IMO same quality with WIX, Bosch, Pureolator. Altho an Aimsoil dealer will tell you diferent.

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Old 05-11-2012, 08:19 AM   #3 (permalink)
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I just bought my first-ever AC Delco filter for my 6.5 post-rebuild this week and was reasonably impressed with what I saw inside - a lot of metal, no cardboard (like the cheapie Frams) and not a lot of plastic.

Previously I've used the "Premium" Fram filters (which are built considerably better than the cheapies) and they fared well, but the AC Delco's look superior at very little additional cost so I'm going to continue to use them now I do believe.
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Old 05-11-2012, 08:34 AM   #4 (permalink)
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A few years ago Delco was doing some switching of vendors and their filters were total crap. They were so bad that I would presume they had to have improved but I have not tried them again. Been using WIX or the Napa Golds. Oriley is who carries the WIX in my area.
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Old 05-11-2012, 09:27 AM   #5 (permalink)
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If your oil filter is sideways you must have the anti-drain back valve.

The 6.5s oil filter, regardless of brand, should have an anti-drain back. That way even on the 2wds, where it's not needed a different filter didn't have to be built.

I found that on my K-5 when i used a filter that didn't have an anti-drian back valve you could hear the difference in the turbo on morning startups if you listened by the exhaust. It sounded like the turbo had no lubrication at first.

This is most likely due to where the oil for the turbo comes from, which is right by the oil filter, as opposed to the boss in the block on the 6.5s.

I'm running Wix 51060s on both trucks. I tend to run Amsoil oil filters on the 96 with the Amsoil 15w-40, but i was out of the filters. Normally with the Amsoil filter and oil i run ~10K intervals. With a Wix filter i'll change the filter in 3K, and the oil in 6K.

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Old 05-11-2012, 11:06 AM   #6 (permalink)
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Originally Posted by matuva View Post
it may look a dumbass question, but which filter to choose?...
I used to use Baldwin B1428 oil filters on my 6.5.
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Old 05-11-2012, 12:07 PM   #7 (permalink)
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On my 2wd I use a longer 2 quart Wix Filter with no anti-drainback, because its mounted vertically. I have not had any issues with turbo oiling, as WhiteK2500 said could be due to location its tapped from, or oil pump or temperature difference. The drainback valve is to prevent the oil from draining out of it when its not vertical with gravity to hold it in.
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Old 05-11-2012, 02:12 PM   #8 (permalink)
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I use NAPA Gold.
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Old 05-11-2012, 03:36 PM   #9 (permalink)
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= wix
Originally Posted by graplr View Post
i use napa gold.
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Old 05-11-2012, 06:40 PM   #10 (permalink)
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How about a filter for a duramax? It fits right? And will add some capacity?

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