Re: NAPA 1101 Oil Filter

In Reply to: NAPA 1101 Oil Filter posted by Rod (NH) on July 10, 2003 at 16:47:16:

I've been thinking about the conclusion you came to on the new NAPA filter. Since the filtration system on these engines is the "bypass" type, meaning the only oil that goes through the filter is oil that has bypassed the relief valve, the real cause of the low oil pressure is wear in the engine components or oil pump. However it is true that the old style filter design was more dense than the new style, creating an additional restriction and causing an increase in oil pressure. The thing is, you are probably still getting the same volume of oil flow through the engine components with the new filter as you would with the old filter, just at a lower pressure. I know I have seen engines with lubrication systems of this type with components so worn that NO oil is bypassed by the relief valve because the system pressure is so low, which means that absolutely no oil goes to the filter. On a worn engine, the old style filter would get the oil pressure up, but I am wondering if you are really getting any less volume of oil to the bearings. I am interested in knowing anybody else's thoughts on this. Maybe I am wacky. By the way, I have never been a fan of NAPA filters. I have cut them apart and compared them to other brands, such as Fleetguard (the company that is owned by Cummins to produce filters for their engines and other applications)and they just don't measure up. They don't have as many pleats in the filter paper resulting in less filtration area, the ends of the filter media paper are glued together instead of using a crimped metal strip, and they use a bypass system that can actually allow unfiltered oil to go to the engine even if the bypass pressure hasn't been reached. So I am not defending NAPA filters.

Follow Ups:

• Re: Re: NAPA 1101 Oil Filter RAB 10:55:38 07/11/03 (0)
• Re: Re: NAPA 1101 Oil Filter Todd in NC 07:30:16 07/11/03 (1)
  • Re: Re: Re: NAPA 1101 Oil Filter Larry from MD 09:19:22 07/11/03 (0)

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