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Which Oil Filter For Your Boss?

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Discussion Starter · #1 ·
I have always used AC/Delco PH25 filters on my small block Chevy's, but since they have been discontinued, I have been using the part # suggested replacement for the PH25 (small block V8 filter) which is the 454. But the 454 definately is not as big, and does not have the capacity of the 25. I was thinking of maybe a Purolator, Wix or Mobil 1 filter. I run the 15W-50 Mobil 1 oil in the Boss. I was wondering what is the filter of choice for you guys?
 

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Oil Filter

Mike,

I guess I am a glutton for punishment as I know everybody has their own oionion of what to use for oil and an oil filter. However, I have done an exhaustive amount of research on this subject and my conclusions are.

The best filter to use is a WIX 51086 or Napa 1086. It has an anti-drain back valve so your engine has lubrication when it starts.

Also, read all the information on the GM Crate engine site. Your engine is not designed for 15W-50 oil. You should use a 10W-30. Especially in the Hoss where normal operating temps are lower than in a modern automobile.

If you are interested in the technical documentation that backs this up, contact me directly. I don't want to get into a P---ng match on this Forum.

OK, the rest of you guys have at it.
 

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Oil Filters

I have always used Fram filters on my vehicles. On the Boss I was useing the PH30 and I switched to the PH13 for the larger capacity. I found that it was a little too close to the exhaust pipe. The heat from the pipe was discoloring the filter. I figure it was heating the oil too so I went back to the PH30. However this time I used the Fram Tough Gaurd filter #TG30. It is supposed to be a little better and has the anti-drain back valve too.
I have had sales representatives from all the different filter companys drop in to my shop and EVERY ONE of them has the BEST filter!!
Go figure?? Napa filters are made by WIX. The Baldwin guy says Fram is JUNK and that HIS are the BEST!!
Everyone has their own opinion. I guess what ever you feel comfortable with is the way to go.
Rick
 

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One other comment about anit-drainback valves in filter systems.......have you ever removed an oil filter at change time and found it to be dry????????????? Think about this.

Also, Moroso has a unique approach to filtration.......27 micron allows more flow, less restriction and less pressure drop.

Tim
 

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Oil filter

Grumpy,

It is physically impossible for the oil filter, a can with both the inlet and outlet on the top, to drain.

That is not the purpose of the anti-drain valve. The oil filter is on the bottom of the engine and oil flows through it from the pump to lube all the rotating and oscillating assemblies. When you shut off the engine and the pump stops pumping in a forward direction, gravity takes over. Oil tends to drain from the top of the engine (backwards) through the filter and pump into the oil pan. The anti-drain valve prevents this and keeps the top of the engine oil passages full of oil for the next startup.
 

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Brilliant explanation, Neil. Even I understand the anti drain back concept now!
Ding, ding...light bulb just came on!

Thanks.

Chris
 

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Because of the larger headers I have to use the shorty AC filter :twisted: . The oil is Mobil 1 15 50 as per direction of the engine builder Scott Shafiroff of Shafiroff racing. It was a toss up between that and the Amzoil but Mobil 1 is easier to get however, Amzoil does score better on the ASTM four ball wear test than Mobil 1.

Today it was almost 100 and after almost 30 miles at 80 the engine stayed at 180 and the tranny at 190! Thats good enough for me but sitting on the tranny does get hot.
 

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I use the Moroso 22300 because it is short. I have AFR heads that raise my pipes 3/8" and a longer filter can't be used. Don't know if there is an anti-drain thing but I really have no choice. Is there a short chromed filter that has the valve other than the Moroso? Using synthetic oil and the immediate 50lbs. pressure developed, I don't see where the startup is doing any engine damage.
Switched from 15W/50W to 10W/30W after reading posts. Funny..but I used 5W/30W when I got the bike but the factory insisted I use 20W/50W. I never understood this because this is a Chevy engine and GM probably knows what is best to use.
Any short filter with the anti-drain valve?
Joe
 

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Wow...
Neil said it best. The oil that drains from the highest point of the engine flows back through the filter and actually sends the filtered particles back into the engine. This reverse flow flushes out the filter and momentarily starves the engine on the next start up. The anti-drain valve eliminates that reverse flow effect. For filters mounted on the bottom of the engine, you get more reverse flow action but always maintain a full filter. Filters mounted higher such as some * brand engines, you get less reverse flow but a more complete emptying of the filter strictly due to the position and tilt of the filter. I have seen some empty filters on vehicles with relocation kits. They were mounted higher than the oil pan and without an anti drain valve, it seemed to have created a siphoning effect to drain almost all of the oil. Most relocation kits today have built in valves to prevent the emptying. Keep in mind the effects of this draining back to the pan also increase the level of oil in the pan, giving you a slightly higher dip stick level when in fact you may be low on oil. I used to check my oil before the first start up of the day so I wouldn't have to wipe the dip stick to read the level. Now I use a before start up and after start up method to check the viability of the valve. I'm a Fram kinda guy. The chrome is nice, but there is something wild about a full sized orange car oil filter sitting on a motorcycle. Adds a nice color contrast to an already chrome loaded machine.

TJ
 

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Use the NAPA 1061 Gold and 20-50 Vavoline racing oil. Turned onto the oil by a race car builder a few years back. Have a chrome cover that I slip on over the filter. Avail at most speed shops.
Glenn
 
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