Oil Filter Question...

[Matty Moo]

What about the cheap supertech oil filters from Walmart? There is nobody else local to me that supplies oil filters that are no FRAM. I just did an oil change and I still have some chatter.

They're cheap for a reason. I wouldn't use one.

[cn90]

There a 2 valves inside the Mann, Mahle or Bosch filters:

1. Anti-drain back valve: basically a rubber membrane to prevent oil from draining back to the engine when the car is shut off.
Great idea when the oil filter faces downward, such as 1990 Volvo 240 B230F engine.
But it is basically a useless feature in the 850 series because the oil filter faces upward, so there is always oil inside the filter.

2. "By-pass" valve is a spring-load valve.
When the filter element is clogged (from neglected long oil interval or sludge!), the valve opens up to allow oil to flow through.
So unfiltered oil is better than no oil.

Google for pictures of oil filter and you will see.

[cn90]

Re Brand issues, I'd stick to:
- Mann
- Mahle
- Bosch

[confused_al]

...But it is basically a useless feature in the 850 series because the oil filter faces upward, so there is always oil inside the filter.

I would suggest you guys read what MIJ wrote a few years ago:
http://forums.swedespeed.com/showthread ... il-filters

[cn90]

...I would suggest you guys read what MIJ wrote a few years ago:
http://forums.swedespeed.com/showthread ... il-filters

Good point,

I am quoting the same thing written by "Made in Japan" for reference. Picture taken from the link from swedespeed forum:

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