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Old 11-28-2008, 03:36 AM   #1
jacky599r
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Default wat grade dino oil for built motor break in?

may i ask wat's a gd grade to run for a built engine considering e larger clearance?
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Old 11-28-2008, 03:39 AM   #2
spoolinsti05
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contact your engine builder. I would do just 5w30 or 10w30 and use good oil and filter.
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Old 11-28-2008, 08:01 AM   #3
jays05
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I ran Rotella 15w40 for the first ~2500 miles.
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Old 11-28-2008, 08:08 AM   #4
jacky599r
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hmmm, is 15w50 any gd? this is actually the 2nd rebuilt as the first one has gotsome oil ring prob. do i need to break in as long? all in all it has clocked 3000k km for the first rebuilt and then 2000k km for the 2nd. im goin for an oil change so thought if i should try something different. we dont have rontella
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Old 11-28-2008, 10:46 AM   #5
acssa
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Default oil

Cosworth wants 1000 mile on 20W50 mineral oil. Dont rev it passed 4500rpm in general.
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Old 11-28-2008, 08:59 PM   #6
jacky599r
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20w50? woah. shoudnt break in oil be as thin as possible?
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Old 11-28-2008, 09:25 PM   #7
DSM_Outback
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Quote:
Originally Posted by jays05 View Post
I ran Rotella 15w40 for the first ~2500 miles.
+1 If no cats
+2 If you get some heat in the oil before you drive.
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Old 11-28-2008, 09:29 PM   #8
Artie@Agile Auto
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I tried Brad Penn Break In Oil http://www.bradpennracing.com/Products/BIO30.html in my car with great success.

Break in oil will vary. Depends on bearing tolerances and if you will break it in the "old fashioned way" by driving in various speeds and loads or on a dyno.

In most cases, you want to find mineral oil with as much zinc as possible.

http://www.mototuneusa.com/break_in_secrets.htm

Artie
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Old 11-28-2008, 09:41 PM   #9
jacky599r
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is castrol gsx w40 a gd candidate?
im on my last "burst" before transiting to sythethics. Have been on 15w50 all along for the 2nd rebuilt.
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Old 11-28-2008, 09:48 PM   #10
jacky599r
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sorry. GTX 15w40
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Old 11-28-2008, 10:29 PM   #11
Rickyh
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20w50 since day one. Only 2500 miles on the motor so far but all is well. I changed it at 100, 500, 1000 and 2000.
compression is even at 145 on all 4.
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Old 11-28-2008, 11:12 PM   #12
AdamBOMB_STi
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i make it simple. initial fire up, 30w non-detergent cheap oil. drain after 15 mins of idling. then "napa 10w40" changed out a few times until 1000 miles. after that 10w40 or thicker dino oil until 4000+ miles.
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Old 11-28-2008, 11:29 PM   #13
reddevil
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Quote:
Originally Posted by AdamBOMB_STi View Post
i make it simple. initial fire up, 30w non-detergent cheap oil. drain after 15 mins of idling. then "napa 10w40" changed out a few times until 1000 miles. after that 10w40 or thicker dino oil until 4000+ miles.
Yup, cheap oil! If you are replacing it every 200-400 miles and not abusing it, why spend gobs (especially now-a-days) on more exspensive oil that will not see boost?
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Old 11-29-2008, 12:10 AM   #14
project_skyline
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Quote:
Originally Posted by jacky599r View Post
20w50? woah. shoudnt break in oil be as thin as possible?
NO. Using a thin oil for break in is very bad to do. Thin oils dont aid you at all in bedding in the rings.

Use nothing less then 10w40 and never use a synthetic until your pass at least 2500 miles.
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Old 11-29-2008, 12:16 AM   #15
quikcobra
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Quote:
Originally Posted by jacky599r View Post
do i need to break in as long? all in all it has clocked 3000k km for the first rebuilt and then 2000k km for the 2nd. im goin for an oil change so thought if i should try something different. we dont have rontella
Here is how I break my motor's in.

http://www.mototuneusa.com/break_in_secrets.htm
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Old 11-29-2008, 12:34 AM   #16
hybrid gti 2
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What about the Royal Purple break in oil that recently came out?
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Old 11-29-2008, 12:56 AM   #17
AdamBOMB_STi
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Quote:
Originally Posted by reddevil View Post
Yup, cheap oil! If you are replacing it every 200-400 miles and not abusing it, why spend gobs (especially now-a-days) on more exspensive oil that will not see boost?
Even a little abuse is ok. Just as long as you have a proper break-in tune, AFR's and timing NEED TO BE CORRECT. Rpm's are ok, I just don't like to go overboard with the boost. I always use a very light spring in the wg for break in. maybe 3-4psi?? A LOT of engine braking, downshifting, and boosting the whopping 4psi!
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Old 11-29-2008, 01:16 AM   #18
n2oiroc
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quit being sallys. my built motor had less than 100 miles on it before 15 or so 23 psi 6th gear dyno runs. and it runs great!
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Old 11-29-2008, 01:21 AM   #19
AdamBOMB_STi
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Quote:
Originally Posted by n2oiroc View Post
quit being sallys. my built motor had less than 100 miles on it before 15 or so 23 psi 6th gear dyno runs. and it runs great!
I don't discredit that method either, but if I could take my time breaking in a motor I will. Now if I had to make a deadline then yes I'd just fully tune it right away.
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Old 11-29-2008, 02:56 AM   #20
jacky599r
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erm, from where i come from, 35deg c everyday, breakin in with 15w40 is alright? How come is there 2 different school of thoughts, some say less viscos and some say throw in something thick. Ive boost the car initially to let it seat and now is alll shifting, loading and trying not to hit high boost, prolly 0.5bars?
In view of the new piston rings only, 3000km should suffice? I miss those days where i can scream down the streets....

o i just changed to 15w40 this morning. oil press seems a tad lower and less stable.
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Old 11-29-2008, 07:49 PM   #21
project_skyline
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Quote:
Originally Posted by quikcobra View Post
Here is how I break my motor's in.

http://www.mototuneusa.com/break_in_secrets.htm
I used the same method breaking in my new sti short block and it turned out to be a monster in the shadows.
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Old 11-29-2008, 07:56 PM   #22
AwdBoostCreep
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Quote:
Originally Posted by Rickyh View Post
20w50 since day one. Only 2500 miles on the motor so far but all is well. I changed it at 100, 500, 1000 and 2000.
compression is even at 145 on all 4.
I broke my engine in easy for 50 miles. Then gave her 10PSi here and there out of my PT67 turbo. Starting from 2,500 RPM, going to 5,500 RPM, Then deaccelerating in gear after each pull. Did a compression test at 350 mile's. I got dead even 155 on all 4 cylinder's.
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Old 11-29-2008, 10:45 PM   #23
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Quote:
Originally Posted by project_skyline View Post

Use nothing less then 10w40 and never use a synthetic until your pass at least 2500 miles.
2500 is still too soon IMO
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Old 11-30-2008, 04:19 AM   #24
jacky599r
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gents, note this is not a fresh engine per sae. First built - new pistons, rods, bearings...
Then the shop screw it up and i have reinstalled the oil rings. Now im 2.2k km on the odometer. Is that too soon?????????????????????????????????
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