Welcome to the North American Subaru Impreza Owners Club Monday July 14, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Built Motor Discussion

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

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, free of charge, 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, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 09-17-2007, 01:06 PM   #1
IllNastyImpreza
Scooby Guru
 
Member#: 36333
Join Date: May 2003
Chapter/Region: NESIC
Location: East Kingston NH
Vehicle:
DIY project: life
I need more TIME!

Default 5-30 or 10-30 for breakin ??

ok so I've been doin a little bit of reasearch for the best way to break in my motor. I will be running NA for the first 1,000-1500 miles to get the rings to seat the best they can.

I have not decided which breakin method to go with yet though...

A: Balls to the wall ( get the rings to WEAR ! )

b: take her easy... (it will all happen eventualy, and is easier on her....? )

BUT I have not been able to find the best oil to use...

I picked up some Penzoil 10-30 cuz it was on sale,

I plan on filler her up....startin her up and fixing any leaks or whatnot...then changing the oil. Then again after 100 miles, then again after 500,1000,1500 and then return to normal 3k miles...

BUT is it a bad thing to change brands/oil weight once I have picked one??

I have also heard Rotella-T is the best to use... whata u guys think ??

eventually I will be swithing over to full Mobil 1 synthetic....
* Registered users of the site do not see these ads.
IllNastyImpreza is offline   Reply With Quote
Old 09-17-2007, 01:31 PM   #2
flycaster
Scooby Specialist
 
Member#: 60142
Join Date: Apr 2004
Location: Bend, OR
Vehicle:
2011 WRX
Grey

Default

Why not ask Jeremy - he built the motor, no?
flycaster is offline   Reply With Quote
Old 09-17-2007, 06:18 PM   #3
pentaxis
Scooby Newbie
 
Member#: 82471
Join Date: Mar 2005
Location: Portland, OR
Default

I have a built MR2 that I did a hard break-in on. Everything sealed perfectly. I used super cheap 10-40 penzoil dino oil for break-in.
pentaxis is offline   Reply With Quote
Old 09-17-2007, 11:27 PM   #4
dingobite
Scooby Specialist
 
Member#: 82391
Join Date: Mar 2005
Chapter/Region: MWSOC
Location: Lou. ky
Vehicle:
08 OBP Sti
stg2.... 279awhp, 299tq

Default

I just went through this issue myself at 7000 miles on CP pistons regular 2.0L even drained all the synthetic and threw in back in the motor to be sure theres no oil loss so far 1900 miles past the 5,600 mile mark and it looks good i do kinda go into boost alot.


Started out with 10w30 for just under 300 miles went to Rotella 15w40 for nearly 2500 miles then was tuned at 5k miles on a mix of pennz 10w30 and one quart of 10w40 all Dyno oil.
I stayed under 5000 rpms as much as i could for the breakin i did hit 128mph in 5th gear at 273 miles once.
dingobite is offline   Reply With Quote
Old 09-18-2007, 01:43 PM   #5
dmross
Scooby Specialist
 
Member#: 2818
Join Date: Nov 2000
Chapter/Region: MAIC
Location: Pittsburgh, PA
Vehicle:
2000 2.5RS

Default

I ran some cheap-o 5w-30 for the first 50 miles, then switched to Rotella T 15w-40, as recommended by Ron @ Axis. Currently at 600 miles and regularly pushing 5-10psi up to 6000RPM.
dmross is offline   Reply With Quote
Old 09-25-2007, 10:17 AM   #6
IllNastyImpreza
Scooby Guru
 
Member#: 36333
Join Date: May 2003
Chapter/Region: NESIC
Location: East Kingston NH
Vehicle:
DIY project: life
I need more TIME!

Default

cool some good info here...

I think I'll use my cheapo penzoil 10 30 initialy, then again till 100 miles...then switch over to that Rotella T 15-40
IllNastyImpreza is offline   Reply With Quote
Old 09-25-2007, 10:52 AM   #7
jays05
Scooby Specialist
 
Member#: 78165
Join Date: Dec 2004
Chapter/Region: South East
Location: SC
Vehicle:
05 STI 35r + e85

Default

I am gonna stick with rotella-t 15w40 on the next motor. But I may try an SAE 30wt oil for the initial startup and first couple miles (as per Cobb guidelines).
jays05 is offline   Reply With Quote
Old 09-25-2007, 05:30 PM   #8
thunder_sti
*** Banned ***
 
Member#: 68315
Join Date: Aug 2004
Location: P.R. 10 SEC CLUB
Vehicle:
04 Stock internals
520awhp-C16 425awhp-93o

Default

How many hours/miles break in period?

The break-in period is for the rings. The generally recommended break-in period is 1000 miles.

Synthetic or regular oil?

Regular for the duration of the break-in period, then the owner is free to use any type they desire.

First oil change should be performed after how many hours/miles?

After 1000 miles and before the dyno tune.

Oil weight for before and after break in period?

5W-30

More frequent oil changes with new pistons?

Other than the break-in period, no.

More info:

http://forums.nasioc.com/forums/showthread.php?t=907570
thunder_sti is offline   Reply With Quote
Old 09-25-2007, 06:48 PM   #9
IllNastyImpreza
Scooby Guru
 
Member#: 36333
Join Date: May 2003
Chapter/Region: NESIC
Location: East Kingston NH
Vehicle:
DIY project: life
I need more TIME!

Default

Quote:
Originally Posted by thunder_sti View Post
How many hours/miles break in period?

The break-in period is for the rings. The generally recommended break-in period is 1000 miles.

Synthetic or regular oil?

Regular for the duration of the break-in period, then the owner is free to use any type they desire.

First oil change should be performed after how many hours/miles?

After 1000 miles and before the dyno tune.

Oil weight for before and after break in period?

5W-30

More frequent oil changes with new pistons?

Other than the break-in period, no.

More info:

http://forums.nasioc.com/forums/showthread.php?t=907570
why 5-30 ??
IllNastyImpreza is offline   Reply With Quote
Old 09-25-2007, 07:09 PM   #10
Master2192
RIP 10/12/83 to 02/10/08
Scooby Specialist
 
Member#: 83254
Join Date: Mar 2005
Chapter/Region: NWIC
Location: Roy, Washington
Vehicle:
98 2.5 RS
04 WRX

Default

shooting into the breeze, but I think it would be because 5w-30 has a bit less shear protection allowing the piston rings to seal better against the cylinder walls which is what break-in is all about.
Master2192 is offline   Reply With Quote
Old 09-27-2007, 05:03 PM   #11
Jeremy@Cobb
Scooby Newbie
 
Member#: 106514
Join Date: Feb 2006
Default

Quote:
Originally Posted by flycaster View Post
Why not ask Jeremy - he built the motor, no?
No this engine was not build by Cobb, this was an older Original series Cobb closed deck bought used.
Another machine shop now did the machine work, installed sleeves, and built the engine.

- J.
Jeremy@Cobb is offline   Reply With Quote
Old 09-27-2007, 05:50 PM   #12
IllNastyImpreza
Scooby Guru
 
Member#: 36333
Join Date: May 2003
Chapter/Region: NESIC
Location: East Kingston NH
Vehicle:
DIY project: life
I need more TIME!

Default

Quote:
Originally Posted by Jeremy@Cobb View Post
No this engine was not build by Cobb, this was an older Original series Cobb closed deck bought used.
Another machine shop now did the machine work, installed sleeves, and built the engine.

- J.
so what oil do ya recomend for breakin ??
IllNastyImpreza is offline   Reply With Quote
Old 09-27-2007, 07:52 PM   #13
flycaster
Scooby Specialist
 
Member#: 60142
Join Date: Apr 2004
Location: Bend, OR
Vehicle:
2011 WRX
Grey

Default

Quote:
Originally Posted by Jeremy@Cobb View Post
...Another machine shop now did the machine work, installed sleeves, and built the engine...
Ah, gotcha.

Nasty, quit stressing about this, put some decent non-synthetic oil in it, change it a few times, lay off high boost but give it some rev rolls, and break the darned thing in. At some point, you either have faith the builder put together a nice, tight motor...or you don't. Either way, get 'er done.

The only thing that ever concerns me is using the proper weight - and only the builder can answer that because only he knows what bearing tolerances he set. Ask him, then get on with it and go have some fun.
flycaster is offline   Reply With Quote
Old 09-28-2007, 12:46 PM   #14
Jeremy@Cobb
Scooby Newbie
 
Member#: 106514
Join Date: Feb 2006
Default

Quote:
Originally Posted by IllNastyImpreza View Post
so what oil do ya recomend for breakin ??
Like I said in my email to you.
I would suggest to use 10/30 valvoline non-synthetic.


During break in, you change your oil well before the oil has a chance to break down. This is why the exact choice of oil (like Fly mentioned) is not as important.

- J.
Jeremy@Cobb is offline   Reply With Quote
Old 09-28-2007, 02:47 PM   #15
IllNastyImpreza
Scooby Guru
 
Member#: 36333
Join Date: May 2003
Chapter/Region: NESIC
Location: East Kingston NH
Vehicle:
DIY project: life
I need more TIME!

Default

good stuff...

Can't wait to get the thing running.

thanks for the info guys
IllNastyImpreza is offline   Reply With Quote
Old 09-28-2007, 03:23 PM   #16
flycaster
Scooby Specialist
 
Member#: 60142
Join Date: Apr 2004
Location: Bend, OR
Vehicle:
2011 WRX
Grey

Default

Have fun, amigo - we want reports.
flycaster is offline   Reply With Quote
Old 10-01-2007, 07:42 PM   #17
subaru5614
Scooby Newbie
 
Member#: 159072
Join Date: Sep 2007
Default

just went through this issue myself at 7000 miles on CP pistons regular 2.0L even drained all the synthetic and threw in back in the motor to be sure theres no oil loss so far 1900 miles past the 5,600 mile mark and it looks good i do kinda go into boost alot.


Started out with 10w30 for just under 300 miles went to Rotella 15w40 for nearly 2500 miles then was tuned at 5k miles on a mix of pennz 10w30 and one quart of 10w40 all Dyno oil.
I stayed under 5000 rpms as much as i could for the breakin i did hit 128mph in 5th gear at 273 miles once.
subaru5614 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Whos doing the Mazda thing on 10/29 or 10/30? draggin wagon04 Mid West Subaru Owners Club Forum -- MWSOC 13 11-05-2005 01:40 PM
5w-30 or 10w-30 oil for socal weather? garie Service & Maintenance 24 06-07-2004 09:52 AM
What oil is recomended for warmer weather, 10W 30 or 5W 30? Tommi Factory 2.0L Turbo Powertrain 15 04-15-2004 01:18 PM
5W-30 or 10W-30 for Denver area? LWG Rocky Mountains Impreza Club Forum -- RMIC 2 09-28-2002 10:11 AM
5w 30 or 10w 30 pimpomtic Normally Aspirated Powertrain 40 12-19-2000 01:12 PM


All times are GMT -4. The time now is 04:59 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.