![SEARCH](http://www.mustangworks.com/images/search.png)
![The Mustang Works](http://www.mustangworks.com/images/mw_footer_logo.gif)
© Copyright 1995 thru 2008 - The Mustang Works™. All Rights Reserved.
MustangWorks.com is designed and hosted by Aero3 Media.
MustangWorks.com is designed and hosted by Aero3 Media.
![]() |
#1 |
Gimme a Drink!
Join Date: Dec 2002
Location: NYC
Posts: 694
|
![]() what should the oil pressure be on a stock motor 90 gt? i've heard the rule is 10psi per 1000 rpm's. w/ my autometer electric oil pressure gauge taking readings from the stock location next to the oil filter. i run 10w-30
when cold: idle 750rpm = 45-50psi 2000 rpm's = 55-60psi oil pressure will get lower as car warms up.... when at operating temp: (190-195F) idle 750rpm = 20-25psi 2000 rpm = 45-50psi 20-25psi seems a little low to me, but it never dips under 20psi. should i start using 10w-40 when winter is over?
__________________
1990 GT,stock T-5,K&N w/o air silencer,March underdrives,FMS wires,timing@14*,PA Perf 130amp alt,Steeda Tri-Ax Shifter,Steeda adj quadrant/clutch cable/firewall adj,Centerforce II clutch,o/r x-pipe,Magnaflow SS catback,g-load brace, subframes,Bilstein struts/shocks,Autometer gauges, 136k and running strong! |
![]() |
![]() |
![]() |
#2 |
Registered Member
Join Date: Oct 2004
Location: Gainesville, FL
Posts: 103
|
![]() I'm sure you are aware that the reason oil pressure drops after the motor warms up has to do with the oil's "thickness" relative to its temperature. In a sense, warm oil is going to be less dense than cold oil. Be more concerned with the oil pressure once you are driving the car.
Check the level of oil in your car next time its cold. Low oil can show low pressure readings. So basically, the answer to your question is 'No'. 10w-40 is not neccessary. |
![]() |
![]() |
![]() |
#3 | |
Gimme a Drink!
Join Date: Dec 2002
Location: NYC
Posts: 694
|
![]() Quote:
__________________
1990 GT,stock T-5,K&N w/o air silencer,March underdrives,FMS wires,timing@14*,PA Perf 130amp alt,Steeda Tri-Ax Shifter,Steeda adj quadrant/clutch cable/firewall adj,Centerforce II clutch,o/r x-pipe,Magnaflow SS catback,g-load brace, subframes,Bilstein struts/shocks,Autometer gauges, 136k and running strong! |
|
![]() |
![]() |
![]() |
#4 |
Domestic Rice really sucks!
Join Date: Apr 2002
Location: KY
Posts: 973
|
![]() You have nothing to worry about.
__________________
The sig says it all. ![]() |
![]() |
![]() |
![]() |
#5 |
Registered Member
Join Date: Aug 2003
Location: Airdrie, Alberta - Canada
Posts: 28
|
![]() According to the Haynes repair manual, the spec. for oil pressure is 40-65 psi @2000 RPM with engine warm.
|
![]() |
![]() |
![]() |
#6 |
Registered Member
Join Date: Feb 2002
Location: Arlington, Washington
Posts: 92
|
![]() Chris, your numbers on your autometer gauge are the same numbers I get when I drive the car. If it never gets above 20 then you need to worry.
__________________
Black 1990 LX DSS Racing Super Pro Bullit 331, AFR 185, Anderson B31 Cam, 1.6 DSS rockers, Cobra Intake w/ 2 phenolic spacer, Aluminum DS, 3.73 gears, Tremec 3550, Lakewood SFI Bellhousing, MSD Digital 6+, Spintech Side Exhaust, |
![]() |
![]() |
![]() |
#7 |
Registered Member
Join Date: Sep 1998
Location: Oviedo, FL
Posts: 992
|
![]() Numbers look fine...drive it.
__________________
"Support our Troops" Dave 1968 Cougar 2004 Thunderbird 2007 F150 Harley-Davidson, SuperCrew 1986 LTD 1997 Ranger 1992 Honda Civic |
![]() |
![]() |
![]() |
#8 |
Registered Member
Join Date: Nov 1998
Location: Houston, Tx.
Posts: 3,887
|
![]() Oil pressure seems OK to me as well. As the viscosity decreases with warm up, you actually get more oil to the bearings. What does it read at 4000 rpm warmed up.? That would be my question?
Some guys go to great lengths to jack up the oil pressure. All that does is rob power from the engine IMHO. Rev
__________________
'66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe |
![]() |
![]() |
![]() |
#9 |
Rat Killer
Join Date: Aug 2002
Location: Cold ass Ohio
Posts: 1,143
|
![]() My car has 10 psi oil pressure at the traps, at 120 MPH around 6 grand on the tach, ON PURPOSE.
You're fine bro!
__________________
d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply..... ![]() |
![]() |
![]() |
![]() |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Oil Pressure Very low on new setup!!! | Z28EATR | Windsor Power | 17 | 09-16-2003 04:03 PM |
Fuel pressure question - HELP! | Stang_ROTY | Windsor Power | 30 | 05-30-2003 08:20 AM |
Oil Pressure Question | Nixon1 | Windsor Power | 5 | 05-17-2003 11:06 AM |
Rising Fuel Pressure with Rising RPM? | StreetStang37 | Windsor Power | 1 | 05-21-2002 03:49 AM |
fuel pressure and bad injectors??? | wrathchild | Windsor Power | 1 | 10-02-2001 06:40 AM |