I have a perma-cool sandwich adapter and the center nut has 3/4" threads, which is where the full flow filter screws onto. The filter that goes on my wife's car has 13/16" threads so it won't screw on the adapter. Would it hurt anything to use a larger oil filter with 3/4" threads in order to make it screw on the sandwich adapter?
Can I use a slightly larger spin on oil filter than what's recommended?
- Thread starter LateArrivalforLSU
- Start date
- Status
The answer is a tentative "yes". Tentative, because in addition to the 3/4" diameter, you also have to have the same thread pitch as that of the nipple. Additionally, you'd want the bypass opening pressure to be in the same range of the recommended filter.
Larger spin ons are used all the time without the adapter by those wanting over kill more filter area. There are 3 issues, thread size, bypass pressure, and clearance both from the the body and other things that don't move with the engine and not sticking down where it can be hit by road debris. With the adapter, this could be even worse. If the engine doesn't have a bypass, it is absolutely critical to use a filter that does.
Labman hit the nail on the head. If you meet these criteria, you'll be fine. I got this result using the "taller" version of an M1 filter on my Nissan/Infiniti VQ35DE V-6. Since I'm running this oil to 10k miles (about 2.5 months for me), I wanted a larger filter than the puny standard size (which is maybe 1/3 the size of a Coke can). I'm quite pleased with what I got.
I'm not familiar with the sandwich filter you mention.
If Gary is correct and the 3/4" thread is for a by-pass filter...wouldn't going to a full flow spin on decrease the particle size your trying to remove? In that most by-pass filters are rated to remove more efficiently smaller contaminant. Whereas full flow filters have that capability to remove smaller contaminant but also have to be open enough to allow for flow.
I think what you may need is a hydraulic filter. But it has no by-pass valve and no anti-drain either. They can be as low as 3 micron absolute microglass media with 3/4" threads. I would think that might be a better option than a standard full flow for a by-pass filter application. Might be wrong though..
If Gary is correct and the 3/4" thread is for a by-pass filter...wouldn't going to a full flow spin on decrease the particle size your trying to remove? In that most by-pass filters are rated to remove more efficiently smaller contaminant. Whereas full flow filters have that capability to remove smaller contaminant but also have to be open enough to allow for flow.
I think what you may need is a hydraulic filter. But it has no by-pass valve and no anti-drain either. They can be as low as 3 micron absolute microglass media with 3/4" threads. I would think that might be a better option than a standard full flow for a by-pass filter application. Might be wrong though..
- Joined
- Sep 28, 2002
- Messages
- 39,798
Keep in mind GHG ..that (and correct me if I'm wrong) that the sandwich is for a bypass filter. Your ff will have a lot less to trap over the OCI. That is, the ff, of whatever size, will have a lot longer life.
But more is better and certainly can't hurt.
You have no control over the in block bypass setting and most of your 3/4-16 filters (Ford FL1A type) are in a fairly narrow or like range. I wouldn't worry about it, IMHO.
But more is better and certainly can't hurt.
You have no control over the in block bypass setting and most of your 3/4-16 filters (Ford FL1A type) are in a fairly narrow or like range. I wouldn't worry about it, IMHO.
- Status
