Synthetic Oil

[Rampant]

And only 6 holes ...

Yep. I just found it interesting that in that youtube comparo, the RP and Amsoil were almost identical. If you look at the pic of the RP the OP posted, they are different. At least the relief springs are. I will cut this one open after I get my use out of it. I'm about to do my first change, with about 1,500 miles. I will cut the factory installed one up and post pics.

 

[tjfdesmo]

Why not just try the srt filter?

That's what I am running.

 

[raven3]

RodRam
Ran two tests for the affect of oil operating temperature vs ambient air temperature.
Test one,
7 mile uphill 6% grade
Ambient at bottom of grade 98F
Ambient at top of grade , 91F
Ground speed 50 mph cruise control
Load: 500# trailer
Oil temperature at top of grade : 233F

Test two
7 mile uphill 6% grade
Ambient at bottom of grade: 73F
Ambient at top of grade: 71F
Ground speed, 50 mph cruise control
Load: 500# trailer
Oil temperature at top of grade: 226F

Note: grade: 5w30 both tests

 

[Hemi395]

Switched to the Wix XP 57060XP yesterday afternoon. For those who haven't changed a filter on these trucks without changing the oil, be prepared more of a mess. Have your new filter filled with fresh oil and ready to go before you start unscrewing the old filter as oil does drain slowly out of the filter housing.

The Wix definitely has a little better flow than the RP 10-48, particularly on cold starts. With the RP my cold start oil psi was about 55-56psi, at operating temp in park was about 33psi. With the Wix XP, cold start is 59-60psi, operating temp in park is still about 33psi. So roughly 4-5psi difference on cold starts, no measurable difference at operating temp.

I feel cold start oil flow is especially important with Hemi's so I'll be running the Wix XP filter from now on. Thanks @RodRam for bringing this up!

 

[Nutshell]

Switched to the Wix XP 57060XP yesterday afternoon. For those who haven't changed a filter on these trucks without changing the oil, be prepared more of a mess. Have your new filter filled with fresh oil and ready to go before you start unscrewing the old filter as oil does drain slowly out of the filter housing.

The Wix definitely has a little better flow than the RP 10-48, particularly on cold starts. With the RP my cold start oil psi was about 55-56psi, at operating temp in park was about 33psi. With the Wix XP, cold start is 59-60psi, operating temp in park is still about 33psi. So roughly 4-5psi difference on cold starts, no measurable difference at operating temp.

I feel cold start oil flow is especially important with Hemi's so I'll be running the Wix XP filter from now on. Thanks @RodRam for bringing this up!

Was there any audible difference at start up?

 

[Hemi395]

Was there any audible difference at start up?

Not that I could tell anyway. But my truck has never been that noisy on cold starts except while running PP...

 

[R.L.K.]

I would've thought your cold oil start up oil pressure would've dropped with the Wix Xp 8 hole high flow filter verses the 6 hole RP10-48 filter , not risen ?

I must be thinking backwards ?

TO ALL , Where is the oil pressure transducer located on these trucks ?

 

[raven3]

Agree that ambient air temperature is not at the top of the list of factors influencing the oil operating temperature compared to engine speed, ground speed, towing or payload , oil grade or engine efficiency.
Based on my test would say that ambient temperature could increase oil operating temperature by as much as 7-10F.
However based on another test with results recently posted on this thread,
found a 6F increase in operating oil temperature of using 5w30 compared to 5w20. 5w20 ran cooler than 5w30 in the 5.7.

 

[smiley]

Make sure you guys are paying attention to which year Hemi it is for. My Ram being older 4th gen uses 20-820 RP filter. I'll check my pressures when I start up later after work.

 

[raven3]

The state of CA has a program to educate folks to perform OC based on manufactures recommendations rather than the sticker plastered on the windshield by quick change oil services and even dealerships.
Back in the fifties full service stations would always check the oil level, pump the gas that clean the windshields.
Back then the engines consumed a lot of oil compared to today, so oil level was checked on a regular basis and changed on 3000 mile intervals.
One issue associated with extended OC with synthetics is that folks do not check their oil level on a regular basis.

According to a study performed by CA , 51% of OC are still performed on 3000 mile intervals and only 33% on 4000 intervals because of the influence of quick oil change service stations

 

[R.L.K.]

Make sure you guys are paying attention to which year Hemi it is for. My Ram being older 4th gen uses 20-820 RP filter. I'll check my pressures when I start up later after work.

The 20-820 is the larger diameter filter , correct ?

 

[raven3]

Ram went to the shorter Oil filter when the electric power steering unit replaced the hydraulic steering unit.
The electric unit has a housing directly below the oil filter can. The shorter oil filter allows more clearance between the steering unit housing and filter can.
This short filter is the same size as the oil filter on a 4 cylinder 2.4L Honda engine and smaller than the filter on my Harley Davidson.

 

[R.L.K.]

Ram went to the shorter Oil filter when the electric power steering unit replaced the hydraulic steering unit.
The electric unit has a housing directly below the oil filter can. The shorter oil filter allows more clearance between the steering unit housing and filter can.
This short filter is the same size as the oil filter on a 4 cylinder 2.4L Honda engine and smaller than the filter on my Harley Davidson.

I'm aware of the shorter filter and the electric sterring unit , but there appears to be plenty of room on my 2014 Ram 1500 4x4 for the larger filter . The larger filter is taller but mainly larger in diameter I think .
Wish I had a picture to reference with the RP 10-48 & Rp20-820 side by side .

I wonder as far as the engine is concerned does it matter which filter is used , or if it's just a clearance issue ?



TO ALL , who is using either of these filters

In a 2013 + Ram 5.7L 1500 4x4 with electronic power sterring ?
Thanks for your response !

 

[Danno]

It's a clearance issue. The MO-899 (larger filter) fits where the 4cyl dart filter is used.

 

[R.L.K.]

Yeh , I'm pretty sure the larger Wix Xp or the Royal Purple filter will fit , here's pics of my current RP10-48 , plenty of room for a taller filter , but limited to about 3/4 " for a larger diameter filter .
The steering unit is no where near being an issue ?

 

[Rampant]

I would've thought your cold oil start up oil pressure would've dropped with the Wix Xp 8 hole high flow filter verses the 6 hole RP10-48 filter , not risen ?

I must be thinking backwards ?

TO ALL , Where is the oil pressure transducer located on these trucks ?

Theoretically, you are correct. The oil pump is not variable. It is a constant velocity pump which provides a fixed amount of flow. IF the 8 holes made any difference in flow in the system, you would see a drop in pressure. Remember, pressure and flow are inversely proportionate. If flow goes up, pressure goes down and vise-versa.

I'm sorry, but the 6 or 8 hole thing is a moot point. The filter is not designed with holes capable of flowing less than the media can process. The "choke point" in the system (this is what induces flow restriction and "causes" pressure) is the bearing tolerances. That is exactly where you want it. The slight difference in pressure with the new vs old oil is that the oil viscosity and filter media have broken down a bit over the its life.

Not that it matters, but the oil pressure sensor is in the right side of the block. See description below:

DESCRIPTION

The oil pressure sensor uses the following three circuits:

Signal circuit to the PCM
Sensor ground circuit from the PCM
5 volt reference circuit from the PCM
The oil pressure sensor returns a voltage signal back to the PCM with reference to oil pressure. Ground for the sensor is supplied by the PCM.

The oil pressure sensor is located on the right side of the engine block. The sensor screws into the engines main oil gallery.

 

[R.L.K.]

I agree 100% with your statement sir !

Thanks for posting .

 

[misuracaf10]

So if it is lower pressures that we are looking for for better flow, which filters are providing the lowest ones weve seen in this post? I haven't kept track but maybe someone has noticed certain filters giving different pressures.


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[R.L.K.]

The reason I even started considering a diff filter than the RP 10-48 I'm running now is because a member here suggested it may causes higher oil pressure with reduced flow because it has fewer holes for flow , and suggested using the Wix filter with 8 holes for improved flow . This seemed plausible so I purchased the WIX-XP to experiment by recording oil pressures at spacific settings with my current filter with 6 holes and then install the Wix with 8 holes and compare the #s .

I'll be installing the Wix Xp filter tonight and should post the comparison #s tomorrow after work , this will allow me to drive enough on the oil to get it above 200° for good comparison #s .

 

[Rampant]

So if it is lower pressures that we are looking for for better flow, which filters are providing the lowest ones weve seen in this post? I haven't kept track but maybe someone has noticed certain filters giving different pressures.


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Wherever there is the least amount of flow is where the pressure of the entire system comes from. This should be (hopefully) in your main bearing tolerances. You dont want the filter to have anything to do with your oil pressure. If changing your oil and filter alone significantly raises your oil pressure, it is restricting the flow. More/bigger is not always better!

And just fyi... the minimum factory spec for oil pressure is 4 psi at idle, in park. Yes, that is the factory minimum spec. On the other end, the system relief valve is set to crack at 75 psi.

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