Bigger oil filter for 2002 Sentra?

And you hope to acomplish?

What would a bigger filter do?

A lot of people are of the mistaken impression that bigger¾tter.

like the person that originated this post.

what a lot of people seem to forget is that once a particular oil pressure is met the oil filter is bypassed and not used in the oiling circuit of the engine.

I am now confused. Does your statement imply that if the filter gets blocked the oil pressure increases so that the filter is bypassed? If so, would not bigger¾tter.

Please elaborate .. unconfuse me .. what do you mean by "particular oil pressure"

Thanks ....

Norm

How this works..

The oil goes -to- the filter from the pump. As long as the filter can flow enough oil so the pressure drop across the filter is above what the "bypass" is set for, the oil is filtered. If the filter cannot flow enough oil because it's clogged or the filter has "micro filtration" paper that is too fine, the oil isn't filtered at all.

The factory nissan filter is going to have the right micron size paper to allow the oil to be filtered and sized to allow quick oil pressure. With the aftermarket filters? Who knows! Fram ect claim to have "microfine" filter paper to filter down to microscopic size particles, in use the filter paper is so fine the oiling system runs in bypass mode and no filtering takes place at all! Unless you are sure of the actual specs of what you are using (no way to be sure...) stick with the factory filters.

The idea is that a bigger filter can have more filter paper and therefore more filter area and therefore trap more crude before it clogs and gets bypassed (and therefore less likely to be bypassed at any given oil/filter change interval). In this aspect, all other things being equal, bigger is better.

However, when the filter is bigger, and if the filter drain back valve is crappy (oil drains from filter when engine stops), it takes a longer time for the oil pressure to build up, so the engine runs for a fraction of a second longer with no oil pressure.

Anyway, has anybody seen a bigger filter?

Ray

Steve T wrote:

"a fraction of a second" is more like 1-2 seconds in reality for the oil system to come up to pressure with a large filter.

The other issue: Is this bigger filter too fine where it runs in bypass all the time?

Best advice is don't second guess the people who designed the engine.

You're not serious are you? The filter is in the circuit unless it can't keep-up with the flow and the bypass valve opens. This should not occur in a reasonably clean filter.

I know that, guess I need to add a tag the next time.

Go to NAPA and get the biggest "Gold" line filter (made by Wix, or their p/n15151) that will fit your application (probably the # 1515 @ $5). Not only will it be much cheaper than the factory model, it will work better. Also get an original Delco filter wrench from a Delco parts dealer. Last a lifetime (your grandkids, too.)

There is a guy on nissanmurano.org that installed an Amsoil dual remote filter on his car.

Hi Ray,

Nissan filter # 15208-9E000 Used on a variety of the V6's [VQ series], the larger 2.5L I4 etc. I checked the QG18 specific filter at the local Canadian Tire, it's extremely small compared to the filter with the part number listed above...

An oil filter salesman from a company that shall remain nameless once confided that they assumed every filter was clogged enough after 1000 miles of use to be in bypass mode.

FWIW, Bob

Sounds like Fram.

Funny you mention that. I was looking at an L20 engine from a 510. It had a K&N filter that was huge. It look like an old V8 filter.

I think Fram makes a line called Double Guard or something like that is twice the capacity or filtration of a std. filter.

Nope. Someone reputable. Did I mention that he was lubricated with alcohol ? :-)

I assume it was an aftermarket company?

Whom do you think makes OEM filters for the car companies?