Oil pressure clarification
07-02-12, 09:08 PM
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Oil pressure clarification
Hey Guys,
I tried searching this but kept coming across some conflicting information...so I figured at this point it is best to just directly ask. Can anyone confirm oil pressure specs on a stock motor at idle, 2000, & 3000 rpm, and max?? I've seen 60psi@2k rpm and 3k rpm so I'd just like to confirm.
I just switched to Brad Penn 10w30 and I am barely making 60psi at 3k now, where I made that pressure at 2k rpm with 10w-40. This is at full temp, not cold.
Appreciate the assistance.
I tried searching this but kept coming across some conflicting information...so I figured at this point it is best to just directly ask. Can anyone confirm oil pressure specs on a stock motor at idle, 2000, & 3000 rpm, and max?? I've seen 60psi@2k rpm and 3k rpm so I'd just like to confirm.
I just switched to Brad Penn 10w30 and I am barely making 60psi at 3k now, where I made that pressure at 2k rpm with 10w-40. This is at full temp, not cold.
Appreciate the assistance.
07-02-12, 10:34 PM
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Original Gangster/Rotary!
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I would absolutely be running 20w50 in this heat we've been having, you're moving the wrong way.
If you're near the IRP shop in the Metuchen area I encourage you to stop by and meet us
If you're near the IRP shop in the Metuchen area I encourage you to stop by and meet us
07-02-12, 10:35 PM
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T67, did I say 7?
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07-02-12, 11:46 PM
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Another very good place to read up on oil is Bob is the Oil Guy
To add further confusion to this subject however: Forced Performance Oil Recommendations
Force Performance has some objective data to back up their recommendations as well.
This always seems to be a topic that is subject to hearsay and experts with differing opinions and data.
07-03-12, 08:18 AM
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Thanks for all of the links and info guys! I've read a ton on bitog over the years and even have run across the excellent info from the ferrarichat link...but none of it is particularly specific to the FD in regards to target oil pressure.
Reading the thread from Dale Clark which suggests 5w30 with a zdpp additive (which is what prompted me to drop from 40 to 30) and every other thread I could find about oil/oil pressure I've seen some conflicting info which is why I posted this. My motor is bone stock with the OMP still connected. If there is an actual spec for oil pressure at a specific rpm I'd have a good idea where I am at with oil selection.
With 40wt(Castrol 10-40) I am at 60psi by 2k rpm hot
I am at the line below 120psi at 3krpm hot. Does not go any higher beyond that which I assume is the regulator bypassing.
On 30wt (brad penn 10-30) I am below 60psi at 2k rpm and at 60psi ~2500 rpm
I am just a tick above 60psi at 3k rpm hot. Will not climb much higher beyond that at higher rpm but holds steady and does slightly increase.
Goodfella - I've since moved upstate NY but my brother is still there in Edison, next time I visit I'd def like to stop in. I had considered bumping to 20w50 but based on the high pressure with 10-40 I didn't think it was a good idea, but that was just my perception.
Reading the thread from Dale Clark which suggests 5w30 with a zdpp additive (which is what prompted me to drop from 40 to 30) and every other thread I could find about oil/oil pressure I've seen some conflicting info which is why I posted this. My motor is bone stock with the OMP still connected. If there is an actual spec for oil pressure at a specific rpm I'd have a good idea where I am at with oil selection.
With 40wt(Castrol 10-40) I am at 60psi by 2k rpm hot
I am at the line below 120psi at 3krpm hot. Does not go any higher beyond that which I assume is the regulator bypassing.
On 30wt (brad penn 10-30) I am below 60psi at 2k rpm and at 60psi ~2500 rpm
I am just a tick above 60psi at 3k rpm hot. Will not climb much higher beyond that at higher rpm but holds steady and does slightly increase.
Goodfella - I've since moved upstate NY but my brother is still there in Edison, next time I visit I'd def like to stop in. I had considered bumping to 20w50 but based on the high pressure with 10-40 I didn't think it was a good idea, but that was just my perception.
07-03-12, 10:23 AM
#7
Thanks for all of the links and info guys! I've read a ton on bitog over the years and even have run across the excellent info from the ferrarichat link...but none of it is particularly specific to the FD in regards to target oil pressure.
Reading the thread from Dale Clark which suggests 5w30 with a zdpp additive (which is what prompted me to drop from 40 to 30) and every other thread I could find about oil/oil pressure I've seen some conflicting info which is why I posted this. My motor is bone stock with the OMP still connected. If there is an actual spec for oil pressure at a specific rpm I'd have a good idea where I am at with oil selection.
With 40wt(Castrol 10-40) I am at 60psi by 2k rpm hot
I am at the line below 120psi at 3krpm hot. Does not go any higher beyond that which I assume is the regulator bypassing.
On 30wt (brad penn 10-30) I am below 60psi at 2k rpm and at 60psi ~2500 rpm
I am just a tick above 60psi at 3k rpm hot. Will not climb much higher beyond that at higher rpm but holds steady and does slightly increase.
Goodfella - I've since moved upstate NY but my brother is still there in Edison, next time I visit I'd def like to stop in. I had considered bumping to 20w50 but based on the high pressure with 10-40 I didn't think it was a good idea, but that was just my perception.
Reading the thread from Dale Clark which suggests 5w30 with a zdpp additive (which is what prompted me to drop from 40 to 30) and every other thread I could find about oil/oil pressure I've seen some conflicting info which is why I posted this. My motor is bone stock with the OMP still connected. If there is an actual spec for oil pressure at a specific rpm I'd have a good idea where I am at with oil selection.
With 40wt(Castrol 10-40) I am at 60psi by 2k rpm hot
I am at the line below 120psi at 3krpm hot. Does not go any higher beyond that which I assume is the regulator bypassing.
On 30wt (brad penn 10-30) I am below 60psi at 2k rpm and at 60psi ~2500 rpm
I am just a tick above 60psi at 3k rpm hot. Will not climb much higher beyond that at higher rpm but holds steady and does slightly increase.
Goodfella - I've since moved upstate NY but my brother is still there in Edison, next time I visit I'd def like to stop in. I had considered bumping to 20w50 but based on the high pressure with 10-40 I didn't think it was a good idea, but that was just my perception.
That's a lot of pressure... a lot.
As I said in the post above yours, manual says 50psi at 3k rpm is minimum spec.
-Geoff
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07-03-12, 12:34 PM
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Geoff- exactly what I was looking for, thank you. We must have been replying at near the same time so I didn't see your reply.
Yes I am referencing the factory gauge which I know is not entirely accurate. Its not hitting 120, but the line below though and I'm not sure what that reflects. I should add I took it out shortly after posting my initial reply and when hot I hit that same line at 4k rpm now...I was mistaken to say it only slightly rises above the 60psi line now.
So basically it seems I'm good which is great news. Additionally based on the content of the thread from ferrarichat, is this even optimal? Based on that thread you want to run the thinnest oil that maintains suggested pressure in order to optimize flow. On a motor like ours that relies more on oil for cooling, the maximized flow is desirable correct?? Any thoughts?
Yes I am referencing the factory gauge which I know is not entirely accurate. Its not hitting 120, but the line below though and I'm not sure what that reflects. I should add I took it out shortly after posting my initial reply and when hot I hit that same line at 4k rpm now...I was mistaken to say it only slightly rises above the 60psi line now.
So basically it seems I'm good which is great news. Additionally based on the content of the thread from ferrarichat, is this even optimal? Based on that thread you want to run the thinnest oil that maintains suggested pressure in order to optimize flow. On a motor like ours that relies more on oil for cooling, the maximized flow is desirable correct?? Any thoughts?
07-03-12, 12:39 PM
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Wastegate John
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I agree. You want to run the thinnest oil you can, while maintaining proper oil pressure. If you run too thick of a viscosity you run the risk of actually reducing the amount of lubricating oil that goes through your engine because some may be bypassing back to the oil pan.
I run a 5w-40 engine oil. It is nice and thin at cold temps, this reduces start up wear.
I run a 5w-40 engine oil. It is nice and thin at cold temps, this reduces start up wear.
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