What normal Oil PSI?

BlackFox5.0

Founding Member

Aug 7, 2000

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Massachusetts

Dec 5, 2003

#1

• Dec 5, 2003

• #1

I just put an Autometer Oil pressure gauge in, and it reads around 65-70psi when driving, and around 50 when at idle.....i just want to know whats normal

 

E

eastbmx

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Dec 14, 2002

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long island

Dec 5, 2003

#2

• Dec 5, 2003

• #2

mine reads about 60 at idle and almost 80psi under throttle.. i have a feeling that is too high, i suspect the gauge or sending unit to be at fault. im just lazy i havent taken it apart yet.

 

1

1990LXDropTop

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Dec 4, 2003

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Western Massachusetts

Dec 5, 2003

#3

• Dec 5, 2003

• #3

Hmmmm, mine reads 25psi at idle and 50psi under throttle. Is this too low?

 

93 teal terror

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Jul 13, 2001

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Durham N.C.

Dec 5, 2003

#4

• Dec 5, 2003

• #4

1990LXDropTop said:

Hmmmm, mine reads 25psi at idle and 50psi under throttle. Is this too low?

Click to expand...

no thats about right....if it goes under 20 at idle,i would say you have a problem. Haynes says that 44-60psi at 2000 rpm when warm is normal. Im getting right at 44 and mine at idle is anywhere from 23-28 depending on how warm the car is.

Blackfox....i see you have a high volume oil pump...this is probably the diff.

 

stangbear427

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Nov 11, 2002

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New England

Dec 5, 2003

#5

• Dec 5, 2003

• #5

Right. It totally depends on your mileage too. As a rule of thumb, you are safe with 1psi. of pressure for every 100RPM's; or, if it's easier, 10psi for every 1000. Theoretically, if you're idling at 900 and have 12psi you're still safe. 80psi seems high under any circumstance, in a fully warmed up stang- but as long as you aren't smoking or puking oil out any engine gaskets it should be fine.

 

Black331Stang

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Apr 29, 2003

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Long Island, NY

Dec 5, 2003

#6

• Dec 5, 2003

• #6

ive heard (that mustang 5.0 book)that at 2000 RPM u should be at or around 40 psi...and thats worked out on 3/3 cars so far that ive done it one..so i stick to that

 

BlackFox5.0

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Aug 7, 2000

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Massachusetts

Dec 5, 2003

#7

• Dec 5, 2003

• #7

I just put in a mechanical gauge, and I do have a high volume oil pump, but theres a difference between high volume and high pressure, so it should be the same as a stock pump I would assume...Just wanted to know what normal is, so I can tell if I have a problem

 

G

grey302

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Aug 2, 2003

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Reidsville, NC

Dec 5, 2003

#8

• Dec 5, 2003

• #8

you're fine, promise

 

Black331Stang

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Apr 29, 2003

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Long Island, NY

Dec 6, 2003

#9

• Dec 6, 2003

• #9

do the test i said..tell me what it reads..

 

BlackFox5.0

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Aug 7, 2000

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Massachusetts

Dec 6, 2003

#10

• Dec 6, 2003

• #10

Black331Stang said:

do the test i said..tell me what it reads..

Click to expand...

Can't my car is buried in the snow, no more driving till the roads are dry!

 

Black331Stang

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Apr 29, 2003

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Long Island, NY

Dec 6, 2003

#11

• Dec 6, 2003

• #11

haha me too..but when the roads are dry still no driving we are getting smashed pretty good here on LI

 

S

Schlodes

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Feb 26, 2001

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Lidsville.... West side dawg..

Dec 6, 2003

#12

• Dec 6, 2003

• #12

First off, NON synthetic Castrol GTX 10W30.

Mine fully hot is about 40 PSI at idle, and around 50 PSI cruising 2000-2500 RPM, and upper RPMs is no more than 65.... Far as I can tell no ones ever had the motor apart.. cause everything is rusty and looks untouched under there. I know the last 2 owners of it since waay back to 1996 when the one had it so..