your opinion on reusing oil filters?

[river_rat]

My underwear...uh...reasoning is to change the filter if you change the oil so you can get rid of all the old oil. I don't like taking filters off and puting them back on after the gasket has seated nicely.
OTOH, if I were leaving the oil in for 8K miles, I'd leave the filter that long.

 

[dgee]

Seriously, just spend the $6 and get a new P1.
Or switch to a full synthetic and run it twice as long

 

[Bluestream]

There's lots of old oil in the engine anyway that can't drain out. It's not like its has turned to caustic soda or anything. It gets mixed in with the new oil just like it has for the past 100 years. It was fine before you decided to change it, so how bad can a little old oil be? Just remove the filter and drain it if you cant sleep at night.

 

[garlicbreadman]

thanks for the replies. i'm going to run maxlife to 5-6k and change everything out. the oil is still amber in color.

 

[kcfx4]

NO way I'd reuse a filter!! Like someone else said....$25k for a car, 6 bucks or so for a filter......you do the math

 

[tenderloin]

Pay me now...Pay me later

http://www.youtube.com/watch?v=aq3wL8ZXjBU

Pay a little now...or a lot later
http://www.youtube.com/watch?v=WgVdfx-T4nk&feature=related

 

[Sayjac]

Originally Posted By: garlicbreadman
Should i re-used the oil filter in my car? (pureone) it has about 4000 on it. i change the oil every 4k with maxlife.
IMO, you're not getting your money's worth (use) out of a P1 with a 4k filter change. I'd see no problem with you reusing it for another 4k OCI.

That said, at Amazon and Kmart a P1 now is generally < $6, so as others have pointed out the cost benefit of P1 reuse is somewhat negligible. In theory the filter does become more efficient with reuse, but at 99.9% it is difficult to improve on that. Now, if you're filter is somewhat difficult to access or use vac/extraction then reusing a P1 makes more sense.

Another option, would be to use a less expensive filter like the the Classic next time and change it each time.

And, it rarely fails that when this topic is discussed, the dirty underwear analogy comes up.

 

[finalyzd]

You'll be fine run it twice.

 

[tig1]

Adding 1/2 qt. of used oil to 4-4 1/2 qts. of new oil. Let me think that one through. Should I, or, shouldn't I? Doesn't make any since at all.

 

[dmiko]

That would be one big filter to hold 1/2 qt of oil.
0.3 qt would be more reasonable. It is a royal PITA to change the filter in my G35, whereas I can change the oil using an oil extractor without getting under the car. My math: 5 qt of new oil + 0.3 qt of old oil.
Total: 5.3 qt
0.3 qt is 5.7% of the total capacity. I can live with that.
Let's not forget that Honda and Mitsubishi (and other companies) state you should change the filter with every other oil change.

 

[demarpaint]

Originally Posted By: Johnny
"NO" Change the oil, change the filter. "PERIOD"


+1

 

[widman]

An oil filter is not like an air filter. The air filter gets more and more efficient and then shows itself as less high rpm power.

An oil filter goes into bypass and there is no light to tell you. You actually have no idea whether the valves have hardened, the paper has collapsed, etc.

As Gary said, this all assumes you are changing at the right, or "comfy" point for your car, your conditions, etc. I've seen (and posted) filters that shouldn't have even gone the first 1000 miles.

99% of the time you should change both at the right time. What are the exceptions?
-- When my father-in-law was driving, he drove about 500 miles a year. I changed the oil at 6 months, but the filter stayed in for 1000 miles.
--I'm about to pull the oil pan from my car to change a leaky gasket, 600 miles on the oil. I'll leave the filter on.