Search



Go Back   Third Generation F-Body Message Boards > Tech Boards > Tech / General Engine
Register Forgot Password?

Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by Weld Racing
Click Here

Welcome to ThirdGen.org!
Welcome to ThirdGen.org.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!


Reply
 
Thread Tools Search this Thread
Old 05-20-2011, 01:02 PM   #1
Member
 
Join Date: Jun 2009
Location: Hungary
Posts: 141
Car: 1992 Camaro RS
Engine: 3.1L V6
Transmission: 700-R4
Axle/Gears: 3.23

Classifieds Rating: (0)
What oil to run in rebuilt engine?

The title tells everything: what oil should I use to fire up a freshly rebuilt engine?

On some sites I saw to run full organic oil as it is required in the first few hundred miles. Is that true or just some kind of urban legend?
giszo is offline vBGarage Page   Reply With Quote
Old 05-20-2011, 01:37 PM   #2
Junior Member
 
oH HorizoN's Avatar
 
Join Date: May 2011
Location: Arizona
Posts: 80
Car: 1989 IROC-Z Camaro 'Vert.
Engine: 350, ZZ4 motor
Transmission: TH-700R4
Axle/Gears: 2.73 ... for now.

Classifieds Rating: (0)
Re: What oil to run in rebuilt engine?

Not urban legend - synthetic oil is too 'fine' and won't allow the rings to break-in. That's the whole point of synthetic, it can get to places that dino oil can't, which is part of why it cleans better.

It's a SBC right? I'd say 10W-30, 5W-30 wouldn't hurt though.
oH HorizoN is offline vBGarage Page   Reply With Quote
Old 05-20-2011, 01:47 PM   #3
Moderator
 
Apeiron's Avatar
 
Join Date: Jan 2000
Location: Rio Oro de Santa Ana, San Jose, Costa Rica
Posts: 20,979
Car: 1984 Z28 Hardtop / 1988 IROC T-top
Engine: 383 Carb / 305 TPI
Transmission: 4L60 / T-5
Axle/Gears: 3.54 Dana 44 / 3.08 10 bolt

Classifieds Rating: (0)

Re: What oil to run in rebuilt engine?

Might want to tell the manufacturers about that, they're using synthetic for the factory fill on all their new engines.
Apeiron is offline vBGarage Page   Reply With Quote
Old 05-20-2011, 02:01 PM   #4
Member
 
Join Date: Jun 2009
Location: Hungary
Posts: 141
Car: 1992 Camaro RS
Engine: 3.1L V6
Transmission: 700-R4
Axle/Gears: 3.23

Classifieds Rating: (0)
Re: What oil to run in rebuilt engine?

Seems like this is going to be the same that I read at other places as well.
giszo is offline vBGarage Page   Reply With Quote
Old 05-20-2011, 02:04 PM   #5
Junior Member
 
oH HorizoN's Avatar
 
Join Date: May 2011
Location: Arizona
Posts: 80
Car: 1989 IROC-Z Camaro 'Vert.
Engine: 350, ZZ4 motor
Transmission: TH-700R4
Axle/Gears: 2.73 ... for now.

Classifieds Rating: (0)
Re: What oil to run in rebuilt engine?

Quote:
Originally Posted by Apeiron View Post
Might want to tell the manufacturers about that, they're using synthetic for the factory fill on all their new engines.
But are newly built 2010/11 motors he same as a rebuilt engine from who knows how long ago?

Two very different things.
oH HorizoN is offline vBGarage Page   Reply With Quote
Old 05-20-2011, 02:04 PM   #6
Moderator
 
Apeiron's Avatar
 
Join Date: Jan 2000
Location: Rio Oro de Santa Ana, San Jose, Costa Rica
Posts: 20,979
Car: 1984 Z28 Hardtop / 1988 IROC T-top
Engine: 383 Carb / 305 TPI
Transmission: 4L60 / T-5
Axle/Gears: 3.54 Dana 44 / 3.08 10 bolt

Classifieds Rating: (0)

Re: What oil to run in rebuilt engine?

Well it's not like you'll hurt anything by not breaking it in with synthetic. You're also not going to hurt anything by breaking it in with synthetic, too. Either way you can't lose.
Apeiron is offline vBGarage Page   Reply With Quote
Old 05-20-2011, 02:05 PM   #7
Moderator
 
Apeiron's Avatar
 
Join Date: Jan 2000
Location: Rio Oro de Santa Ana, San Jose, Costa Rica
Posts: 20,979
Car: 1984 Z28 Hardtop / 1988 IROC T-top
Engine: 383 Carb / 305 TPI
Transmission: 4L60 / T-5
Axle/Gears: 3.54 Dana 44 / 3.08 10 bolt

Classifieds Rating: (0)

Re: What oil to run in rebuilt engine?

Quote:
Originally Posted by oH HorizoN View Post
But are newly built 2010/11 motors he same as a rebuilt engine from who knows how long ago?
Yes, they are. Cast iron cylinder walls, cast iron rings with or without moly facing, aluminum pistons, steel valvetrain components... that kind of engine technology hasn't changed in a looooooooooooong time.
Apeiron is offline vBGarage Page   Reply With Quote
Old 05-20-2011, 02:06 PM   #8
Junior Member
 
oH HorizoN's Avatar
 
Join Date: May 2011
Location: Arizona
Posts: 80
Car: 1989 IROC-Z Camaro 'Vert.
Engine: 350, ZZ4 motor
Transmission: TH-700R4
Axle/Gears: 2.73 ... for now.

Classifieds Rating: (0)
Re: What oil to run in rebuilt engine?

Quote:
Originally Posted by Apeiron View Post
Yes, they are.
Then please explain to me why everything I have ever read about breaking in motors has explicitly said to use non-synthetic oil.
oH HorizoN is offline vBGarage Page   Reply With Quote
Old 05-20-2011, 02:09 PM   #9
Moderator
 
Apeiron's Avatar
 
Join Date: Jan 2000
Location: Rio Oro de Santa Ana, San Jose, Costa Rica
Posts: 20,979
Car: 1984 Z28 Hardtop / 1988 IROC T-top
Engine: 383 Carb / 305 TPI
Transmission: 4L60 / T-5
Axle/Gears: 3.54 Dana 44 / 3.08 10 bolt

Classifieds Rating: (0)

Re: What oil to run in rebuilt engine?

Because you've read rumors and old wive's tales, not facts from people who produce lubricants and build engines.
Apeiron is offline vBGarage Page   Reply With Quote
Old 05-20-2011, 02:12 PM   #10
Junior Member
 
oH HorizoN's Avatar
 
Join Date: May 2011
Location: Arizona
Posts: 80
Car: 1989 IROC-Z Camaro 'Vert.
Engine: 350, ZZ4 motor
Transmission: TH-700R4
Axle/Gears: 2.73 ... for now.

Classifieds Rating: (0)
Re: What oil to run in rebuilt engine?

Quote:
Originally Posted by Apeiron View Post
Because you've read rumors and old wive's tales, not facts from people who produce lubricants and build engines.
I see no facts here, only what you have said.

EDIT:

What modern companies use synthetic? Because GM paperwork has always said organic oil.
oH HorizoN is offline vBGarage Page   Reply With Quote
Old 05-20-2011, 02:18 PM   #11
Moderator
 
Apeiron's Avatar
 
Join Date: Jan 2000
Location: Rio Oro de Santa Ana, San Jose, Costa Rica
Posts: 20,979
Car: 1984 Z28 Hardtop / 1988 IROC T-top
Engine: 383 Carb / 305 TPI
Transmission: 4L60 / T-5
Axle/Gears: 3.54 Dana 44 / 3.08 10 bolt

Classifieds Rating: (0)

Re: What oil to run in rebuilt engine?

GM uses Mobil 1 for the factory fill in the Corvette and Camaro.
Apeiron is offline vBGarage Page   Reply With Quote
Old 05-20-2011, 03:49 PM   #12
Supreme Member
 
Orr89RocZ's Avatar
 
Join Date: Sep 2003
Location: Pittsburgh PA
Posts: 19,941
Car: 89 Iroc-z
Engine: Twin Turbo 401
Transmission: TH400
Axle/Gears: 4th gen 12 bolt 3.42

Classifieds Rating: (20)

Send a message via AIM to Orr89RocZ
Re: What oil to run in rebuilt engine?

True i have read companies do break ins on factory motors with synthetics.

For my 2 motors, I used regular conventional 10w-30 for initial break in for first 25-50miles. Changed oil to same stuff for another 25 miles or so when doing hard pulls for break in. 1st gear pulls, lower load, higher rpms. Then moved on to 2-3rd gear heavy load pulls to 90% of max rpm.

After that and likely before 100 miles, i went straight synthetic and proceeded to go racing. Never had a problem.


Now if you have a Flat TAPPET cammed motor, you will need a high zinc oil for lubrication on cam break in. They sell special oils for that as most modern oils now do not have proper lubricants for flat tappet cam break ins.

My motors are hydraulic rollers, so you can just fire up, check for leaks and go drive.

One reason to break in on cheap conventional oil is because its CHEAP and you need to change it out a few times after little mileage on the motor. Dont waste synthetic for that
__________________
1989 Twin Turbo IROC-Z
"Twin Turbo 401 Buildup Pics "
Photobucket 401 Twin Turbo
1009 whp / 844 wtq 24.5 psi pump gas only
Orr89RocZ is offline vBGarage Page   Reply With Quote
Old 05-20-2011, 04:48 PM   #13
Supreme Member
 
Stevolwevol's Avatar
 
Join Date: Nov 2008
Location: Michigan
Posts: 1,612
Car: 86 IROC Z, 92 RS
Engine: 305 4bbl, 305 TBI

Classifieds Rating: (1)
Re: What oil to run in rebuilt engine?

Quote:
Originally Posted by Orr89RocZ View Post
True i have read companies do break ins on factory motors with synthetics.

For my 2 motors, I used regular conventional 10w-30 for initial break in for first 25-50miles. Changed oil to same stuff for another 25 miles or so when doing hard pulls for break in. 1st gear pulls, lower load, higher rpms. Then moved on to 2-3rd gear heavy load pulls to 90% of max rpm.

After that and likely before 100 miles, i went straight synthetic and proceeded to go racing. Never had a problem.


Now if you have a Flat TAPPET cammed motor, you will need a high zinc oil for lubrication on cam break in. They sell special oils for that as most modern oils now do not have proper lubricants for flat tappet cam break ins.

My motors are hydraulic rollers, so you can just fire up, check for leaks and go drive.

One reason to break in on cheap conventional oil is because its CHEAP and you need to change it out a few times after little mileage on the motor. Dont waste synthetic for that
This is what I was going to ask. Is it a flat tappet or roller engine? I have been running Rotella in my flat tappet engines. You will need oil that contains 1200 ppm of zddp if it is a flat tappet engine. Rotella, Delo, and Walmart heavy duty all contain 1200 ppm of zddp. Actually the walmart brand has 1300 ppm.
__________________
Stevolwevol is offline vBGarage Page   Reply With Quote
Old 05-21-2011, 12:09 AM   #14
Member
 
Join Date: Jun 2009
Location: Hungary
Posts: 141
Car: 1992 Camaro RS
Engine: 3.1L V6
Transmission: 700-R4
Axle/Gears: 3.23

Classifieds Rating: (0)
Re: What oil to run in rebuilt engine?

Fortunately it is a roller engine.
giszo is offline vBGarage Page   Reply With Quote
Old 05-21-2011, 02:09 AM   #15
Supreme Member
 
Stevolwevol's Avatar
 
Join Date: Nov 2008
Location: Michigan
Posts: 1,612
Car: 86 IROC Z, 92 RS
Engine: 305 4bbl, 305 TBI

Classifieds Rating: (1)
Re: What oil to run in rebuilt engine?

__________________
Stevolwevol is offline vBGarage Page   Reply With Quote
Old 05-21-2011, 03:05 AM   #16
Junior Member
 
Join Date: Apr 2011
Posts: 5

Classifieds Rating: (0)
Re: What oil to run in rebuilt engine?

Seems like this is going to be the same that I read at other places as well.
Click the image to open in full size.Click the image to open in full size.
caaraa is offline vBGarage Page   Reply With Quote
Old 05-21-2011, 08:31 AM   #17
Supreme Member
 
Stevolwevol's Avatar
 
Join Date: Nov 2008
Location: Michigan
Posts: 1,612
Car: 86 IROC Z, 92 RS
Engine: 305 4bbl, 305 TBI

Classifieds Rating: (1)
Re: What oil to run in rebuilt engine?

Quote:
Originally Posted by giszo View Post
Fortunately it is a roller engine.
Run Mobil 1 then.
__________________
Stevolwevol is offline vBGarage Page   Reply With Quote
Old 05-21-2011, 08:48 AM   #18
Supreme Member
 
ASE doc's Avatar
 
Join Date: Apr 2010
Location: Aurora, OR
Posts: 3,619
Car: 87 IROC Z28
Engine: 355 cid TPI, very built
Transmission: Pro Built Automatic w/3,500 stall
Axle/Gears: 3.27 Limited slip

Classifieds Rating: (0)
Re: What oil to run in rebuilt engine?

What my machinist says about synthetic is it doesn't allow the rings to seat properly because it prohibits wear. That's why I run organic oil for the first 1,000 miles. Then switch to Mobil1
__________________
Half effort yields half results.

87 IROC Z28, 355 TPI, 10.2:1, 6" rods, balanced, clearanced, TFS G2 heads fully ported, ZZX Cam, ported Superram base, large tube runners, 1 3/4 pri coated stainless short tube, 58mmTB on ported plenum, ram air, high flow air lid, 24lb bosch @ 70 psi, ACCEL DFI, MSD D6, funct hood louvers, etc. SSM SFCs, Hotchkis rear links& strt twr brace, Eibach Sportline, Koni Red S&S, PST bushings, Ed's 13" w/WW 4 piston calipers in front, LS1s in back. GTA seats, MOMO wheel, B&M Megashifter
ASE doc is offline vBGarage Page   Reply With Quote
Old 05-21-2011, 08:51 AM   #19
Member
 
Join Date: Jun 2009
Location: Hungary
Posts: 141
Car: 1992 Camaro RS
Engine: 3.1L V6
Transmission: 700-R4
Axle/Gears: 3.23

Classifieds Rating: (0)
Re: What oil to run in rebuilt engine?

What brand do you suggest, Ase? Who makes full organic oil?
giszo is offline vBGarage Page   Reply With Quote
Old 05-21-2011, 09:33 AM   #20
Supreme Member
 
Stevolwevol's Avatar
 
Join Date: Nov 2008
Location: Michigan
Posts: 1,612
Car: 86 IROC Z, 92 RS
Engine: 305 4bbl, 305 TBI

Classifieds Rating: (1)
Re: What oil to run in rebuilt engine?

Quote:
Originally Posted by ASE doc View Post
What my machinist says about synthetic is it doesn't allow the rings to seat properly because it prohibits wear. That's why I run organic oil for the first 1,000 miles. Then switch to Mobil1
I've heard this also. I've also heard to the contrary. Gets frustrating.
__________________
Stevolwevol is offline vBGarage Page   Reply With Quote
Old 05-21-2011, 06:23 PM   #21
Supreme Member
 
ASE doc's Avatar
 
Join Date: Apr 2010
Location: Aurora, OR
Posts: 3,619
Car: 87 IROC Z28
Engine: 355 cid TPI, very built
Transmission: Pro Built Automatic w/3,500 stall
Axle/Gears: 3.27 Limited slip

Classifieds Rating: (0)
Re: What oil to run in rebuilt engine?

Ya know? I guess whatever works for you. I suppose the worst that could happen if you switch to synthetic too soon is excess oil cunsumption. Cylinder finish will have a large effect on this. Having the correct finish for the rings you use is important.
__________________
Half effort yields half results.

87 IROC Z28, 355 TPI, 10.2:1, 6" rods, balanced, clearanced, TFS G2 heads fully ported, ZZX Cam, ported Superram base, large tube runners, 1 3/4 pri coated stainless short tube, 58mmTB on ported plenum, ram air, high flow air lid, 24lb bosch @ 70 psi, ACCEL DFI, MSD D6, funct hood louvers, etc. SSM SFCs, Hotchkis rear links& strt twr brace, Eibach Sportline, Koni Red S&S, PST bushings, Ed's 13" w/WW 4 piston calipers in front, LS1s in back. GTA seats, MOMO wheel, B&M Megashifter
ASE doc is offline vBGarage Page   Reply With Quote
Old 05-21-2011, 06:42 PM   #22
Supreme Member
 
Stevolwevol's Avatar
 
Join Date: Nov 2008
Location: Michigan
Posts: 1,612
Car: 86 IROC Z, 92 RS
Engine: 305 4bbl, 305 TBI

Classifieds Rating: (1)
Re: What oil to run in rebuilt engine?

I would like to see empirical evidence that synthetic oil is too slippery for break in.
__________________
Stevolwevol is offline vBGarage Page   Reply With Quote
Old 05-21-2011, 06:49 PM   #23
Supreme Member
 
Stevolwevol's Avatar
 
Join Date: Nov 2008
Location: Michigan
Posts: 1,612
Car: 86 IROC Z, 92 RS
Engine: 305 4bbl, 305 TBI

Classifieds Rating: (1)
Re: What oil to run in rebuilt engine?

This is what Mobil says:

http://www.mobiloil.com/usa-english/...ics/myths.aspx
__________________
Stevolwevol is offline vBGarage Page   Reply With Quote
Old 05-21-2011, 07:07 PM   #24
Moderator
 
Apeiron's Avatar
 
Join Date: Jan 2000
Location: Rio Oro de Santa Ana, San Jose, Costa Rica
Posts: 20,979
Car: 1984 Z28 Hardtop / 1988 IROC T-top
Engine: 383 Carb / 305 TPI
Transmission: 4L60 / T-5
Axle/Gears: 3.54 Dana 44 / 3.08 10 bolt

Classifieds Rating: (0)

Re: What oil to run in rebuilt engine?

Quote:
Originally Posted by ASE doc View Post
Cylinder finish will have a large effect on this. Having the correct finish for the rings you use is important.
That's pretty much it. With bad surface prep you'll glaze the cylinders no matter what oil you use.

Orr89RocZ has the real reason to break in with conventional oil.
Apeiron is offline vBGarage Page   Reply With Quote
Old 05-21-2011, 07:07 PM
ThirdGen
1992 Camaro




Paid Advertisement


Reply

Go Back   Third Generation F-Body Message Boards > Tech Boards > Tech / General Engine

Tags
1987, 305, 350, 3rd, break, engine, firing, gen, kind, oil, rebuild, rebuilt, shoud, time, tpi, usedremanufactured
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92


All times are GMT -5. The time now is 06:41 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
All content copyright 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.

Emails & Contact Details