What do you idle at and what oil do you use?

RoushRacing6N17 · 03-10-2004, 12:38 AM

I am having some idle problems and maybe it is because of my idle speed, It is set at about 650-700 RPM. Also I have low oil pressure and I'm sure its because the bearings are worn and the motor needs rebuilding but I figured maybe a heavier oil can get the oil pressure up a little until the new motor gets in. I am running 10w-40 now. What idle speed and oil do yall use? I had a post about my idling problem not too long back and I am still going to replace some sensors and clean the intake but if my idle speed now is low then it might fix the prob. Thanks, JB

GhettoPop · 03-10-2004, 12:41 AM

idle = 750
oil= 10w-30

Dark_5.0 · 03-10-2004, 10:08 AM

Idle 800rpms
oil 10-30W Castrol

If you are already running 10-40W and have low oil pressure then the engine is in bad shape.

420nitro · 03-10-2004, 11:44 AM

900-1000 rpms
10W40

What is your low oil pressure at anyway???
What is the most you get out of it @3500-4000 rpms?
We all have different ratings for low or high oil pressures. I assume this motor has stock clearences or just even a stock bottom end... right?

mustangII460 · 03-10-2004, 06:35 PM

Try a 20w-50. Since yer in Fla, the extra weight won't hurt it. I run that in the summer time here. Winter time I go back to 10-40.

429mustang · 03-10-2004, 08:31 PM

around 750 with Mobil 5w40 synthetic. Maybe bump your idle up a little (750-800) along with the heavier oil.

tireburner163 · 03-10-2004, 09:13 PM

Idle - 900 rpm
oil pressure - 30-35psi
oil - Castrol 10W30

-Josh, aka the tireburner

bottlebaby91 · 03-10-2004, 10:12 PM

What is your oil pressure? Are you going by an aftermarket gauge or the stock one? If your going by the stock one you probably dont have low oil pressure, that gauge and/or sending unit is weak and that is why it reads low. I have seen a lot of these cars with little to low oil pressure at idle on the stock gauge when they really gave 25psi plus which in my book is sufficient for a stock type motor.

RoadWarrior · 03-11-2004, 10:52 AM

900-1000
45-50psi
Mobil 1 10w-30
In summer i usually use 15w-50 mobil 1

crazypete · 03-11-2004, 03:14 PM

1200-1400 rpms! All you need to do is to let off the brake and the car takes off on it's own! This covers up lopey idle, bad PS pump, AOD issues and removes the need for a choke. Word!

I have always had poor operation on anything other than 10w-30, but my bearings are probably pretty worn. Anything lighter goes right out the tailpipe and anything heavier makes the car feel sluggish.

Mopar1 · 03-11-2004, 03:54 PM

650 rpm's and 10W30

bigred90gt · 03-12-2004, 03:23 PM

I idle at about 900 rpms and use mobil 1 SAE 50 racing oil. But, I live in southeast Texas where the average temp is in the mid 80's to low 90's. In a colder environment, this oil would be like molasses in the engine.

FordFastGirl5.0 · 03-12-2004, 03:29 PM

idle-900rpms
oil- 10w-30

raptor · 03-16-2004, 06:22 PM

I run 900rpm and use Castrol Syn 10w30 I see no one has mentioned that when adjusting Idle you must check TPS and try to keep your range between .90 to .99 volts. Never go past .99 as this will affect WOT.

Good Luck

03-10-2004, 12:38 AM	#1
RoushRacing6N17 Registered Member Join Date: Nov 2003 Location: Panama City, FL Posts: 51	What do you idle at and what oil do you use? I am having some idle problems and maybe it is because of my idle speed, It is set at about 650-700 RPM. Also I have low oil pressure and I'm sure its because the bearings are worn and the motor needs rebuilding but I figured maybe a heavier oil can get the oil pressure up a little until the new motor gets in. I am running 10w-40 now. What idle speed and oil do yall use? I had a post about my idling problem not too long back and I am still going to replace some sensors and clean the intake but if my idle speed now is low then it might fix the prob. Thanks, JB __________________ "Nice chevy you have there, kind of slow isn't it?"

03-10-2004, 12:41 AM	#2
GhettoPop Gimme a Drink! Join Date: Dec 2002 Location: NYC Posts: 694	idle = 750 oil= 10w-30 __________________ 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!

03-10-2004, 10:08 AM	#3
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	Idle 800rpms oil 10-30W Castrol If you are already running 10-40W and have low oil pressure then the engine is in bad shape. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

03-10-2004, 08:31 PM	#6
429mustang Registered Member Join Date: May 2001 Location: westerville, OH USA Posts: 618	around 750 with Mobil 5w40 synthetic. Maybe bump your idle up a little (750-800) along with the heavier oil. __________________ 1990 Notchback: BBK Ceramic Coated Full length headers, Dr. Gas 3"- 2 1/2" x-pipe, Flowmaster 40's/turndowns.

03-10-2004, 09:13 PM	#7
tireburner163 It's a lot like a race car Join Date: Aug 2000 Location: Meridian, MS Posts: 4,130	Idle - 900 rpm oil pressure - 30-35psi oil - Castrol 10W30 -Josh, aka the tireburner __________________ 1987 Buick T-type 1998 HD Electra Elide

03-10-2004, 11:44 AM	#4
420nitro Registered Member Join Date: Nov 2003 Location: Rockford Posts: 596	900-1000 rpms 10W40 What is your low oil pressure at anyway??? What is the most you get out of it @3500-4000 rpms? We all have different ratings for low or high oil pressures. I assume this motor has stock clearences or just even a stock bottom end... right?

03-10-2004, 06:35 PM	#5
mustangII460 Factoy Five Roadster Join Date: May 2000 Location: Sevier Co,Tennessee Posts: 1,681	Try a 20w-50. Since yer in Fla, the extra weight won't hurt it. I run that in the summer time here. Winter time I go back to 10-40.

03-10-2004, 10:12 PM	#8
bottlebaby91 Registered Member Join Date: Nov 2002 Posts: 141	What is your oil pressure? Are you going by an aftermarket gauge or the stock one? If your going by the stock one you probably dont have low oil pressure, that gauge and/or sending unit is weak and that is why it reads low. I have seen a lot of these cars with little to low oil pressure at idle on the stock gauge when they really gave 25psi plus which in my book is sufficient for a stock type motor.

03-11-2004, 10:52 AM	#9
RoadWarrior Registered Member Join Date: Apr 2000 Location: Edmonton,Alberta,Canada Posts: 317	900-1000 45-50psi Mobil 1 10w-30 In summer i usually use 15w-50 mobil 1 __________________ Fast Company

03-11-2004, 03:14 PM	#10
crazypete Registered Member Join Date: Sep 2002 Location: Boston Posts: 592	1200-1400 rpms! All you need to do is to let off the brake and the car takes off on it's own! This covers up lopey idle, bad PS pump, AOD issues and removes the need for a choke. Word! I have always had poor operation on anything other than 10w-30, but my bearings are probably pretty worn. Anything lighter goes right out the tailpipe and anything heavier makes the car feel sluggish. __________________ 91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior

03-11-2004, 03:54 PM	#11
Mopar1 Registered Member Join Date: Mar 2002 Location: Lakewood, Wa Posts: 161	650 rpm's and 10W30 __________________ '77 Aspen R/T: 318 w/273 heads, 4spd, Hurst Shifter, 600 holley, edelbrock intake, 8 3/4 axle, 3.23 sure-grip, dual 3" exhaust, MP cam 276 / 276 duration 490 / 490 mech solid lifter, Super Stock Springs (15.65@88 3900lbs) '91 Mustang LX: .030 Bored, Typhoon Intake, 4.10's, Lentech VB, BBK 70mm TB, FMS A/C elim bracket, 19lbs inject, off road H-pipe, 75mm pro-m MAF, FRP unequal shorty, stormin normin hood. 3420 Lbs w/ 220 (me) and 13 gal gas. '02 SS Camaro

03-12-2004, 03:23 PM	#12
bigred90gt 2 Stangs in the Stable Join Date: Apr 2002 Location: Baytown, TX Posts: 1,209	I idle at about 900 rpms and use mobil 1 SAE 50 racing oil. But, I live in southeast Texas where the average temp is in the mid 80's to low 90's. In a colder environment, this oil would be like molasses in the engine. __________________ '90 GT Under construction Best E.T. = Fast @ High Speeds - OK So I Lie. So What!!! 04 F-150 STX 4.2L 5 spd Rice Haters Club Member #128

03-12-2004, 03:29 PM	#13
FordFastGirl5.0 Registered Member Join Date: Nov 2003 Location: Collinsville, IL Posts: 46	idle-900rpms oil- 10w-30 __________________ 1990 mustang LX hatch 5.0 holly upper/lower intake, timing chains, F303 cam, 24lb fuel injectors, 75mm mass air meter, underdrive pulleys, 3:73 gears, BBK C.A.I., BBK long tube headers, Off road H-pipe, 17" cobra R's, 2800 stall yet to come.......

03-16-2004, 06:22 PM	#14
raptor Registered Member Join Date: Sep 1999 Location: Dundalk, Ont, Canada Posts: 129	I run 900rpm and use Castrol Syn 10w30 I see no one has mentioned that when adjusting Idle you must check TPS and try to keep your range between .90 to .99 volts. Never go past .99 as this will affect WOT. Good Luck __________________ 88GT, 331Stroker,FMS 70mm TB,77mm Pro-M mass air,Ram Air,K&N,GT40/Exployer Intakes,Gasket Matched,FMS 24lb injectors,Crane hi-6 ignition system,B303 cam,Crane 1.6RR,FMS underdrive pullies,351W/heads,port/polish,FMS h/f oil pump,Hedman headers,2 1/2in H pipe Flow Masters,190lph Holley fuel pump,Center Force dual friction,FMS 3.55,Hurst short throw/ trigger T handle,Subframe connectors,Welded torque boxes.