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Engine break in oil

Discussion in 'The Hokey Ass Message Board' started by str8enough, Apr 10, 2008.

  1. str8enough
    Joined: Mar 17, 2008
    Posts: 26

    str8enough
    Member
    from Omaha, NE

    What is everybody using for engine break in oil? I/m getting ready to fire my freshly rebuilt 390 I'm looking for advice on what to run in this engine to break it in with no problems. Thanks Alot --Joe
     
  2. BigChief
    Joined: Jan 14, 2003
    Posts: 2,084

    BigChief
    Member

    Non-synthetic Brad Penn or Vavoline racing oil (make sure it says its specific for off-road use on the bottle) and a bottle of CompCams break-in additive. Do the break-in as usual, dump the filter and oil, reload with the same 'mix' and a fresh filter and drive it like a sane human being for 500 miles.....dump the oil and filter and start your normal oil change interval. If your extra anal like me change the oil/filter again at 1500 miles and then LET THE BEATINGS BEGIN!

    *All* current on-highway oils (including Rotella T made since late '07) have reduced levels of zinc and sulfur. The use of off-road racing oils and oils specifically designated for older diesels still has the good stuff in it. One word of caution is that most racing oils are formulated with less detergent/surfactacts in them meaning that they'll build up sludge qiucker and won't 'carry' as much dirt as typical on-highway oils. Those of us who change out regularly at 3K shouldn't see any issues with that, however, folks who are changing out at 5K or 7.5K might see some long term issues.

    -Bigchief.
     
  3. Big Tony
    Joined: Mar 29, 2006
    Posts: 3,589

    Big Tony
    Member

  4. maxspeedracing
    Joined: Sep 16, 2007
    Posts: 191

    maxspeedracing
    Member

    I just used some Joe Gibbs (BR) oil on a dodge. It is designed with lots of zinc for flat tappet cams. When the engine gets hot the oil pressure drops down to about 25. The first time this happened it scared me, but it started off high again cold and then went back to 25 hot. I did it in two sessions of about an hour each. Engine got nice and hot, so I'm sure the cam got a good breakin.
     

  5. str8enough
    Joined: Mar 17, 2008
    Posts: 26

    str8enough
    Member
    from Omaha, NE

    Anybody heard of this GM E.O.S assembly lube you add to oil?
     
  6. maxspeedracing
    Joined: Sep 16, 2007
    Posts: 191

    maxspeedracing
    Member

    I used a tube of assembly lube from Oreillys (forget the brand), and gooped-up everything during assembly.

    It all disappeared after a few minutes.
     
  7. BigChief
    Joined: Jan 14, 2003
    Posts: 2,084

    BigChief
    Member

    No Longer Available.
     
  8. deucemanab
    Joined: Apr 19, 2006
    Posts: 238

    deucemanab
    Member

    Mobile 1,15/50 Has Plenty Of Zinc,you Pay Extra For It.
     
  9. Fogger
    Joined: Aug 18, 2007
    Posts: 1,634

    Fogger
    Member

    GM has a new part number for Engine Oil Supplement. E.O.S. Assembly Lubricant #88862586 Gr.8.800. I recently purchased four bottles from a local Chevy dealer. The FOGGER
     
  10. no55mad
    Joined: Dec 15, 2006
    Posts: 1,920

    no55mad
    Member

    Buy off the shelf oil and add a bottle of ZDDPlus sold by an Alliance Vendor here, or EBay or Eastwood. Its got more zddp than GM EOS and it's cheaper. See their web site at www.ZDDPlus.com
     
  11. Flat Ernie
    Joined: Jun 5, 2002
    Posts: 8,406

    Flat Ernie
    Tech Editor

    EOS has been reformulated & reintroduced w/in the last 6 months - I have seen no info on zinc for it.

    Another vote for Brad Penn
     
  12. Paul2748
    Joined: Jan 8, 2003
    Posts: 2,234

    Paul2748
    Member

    Go to a parts store and look for the old diesel oil with code CI-4 (Not CJ-4-see below) The last time I looked, there was a lot of it still on shelves. May not be Rotella T as they switched to the CJ-4.

    Based on a study recently published, the CJ-4 oil supposedly has more ZPPD than regular oil produced in the mid 80's, so it should be ok to use.

    www.ctci.org, click on Gil's Garage, click on Engine Oil Part 2
     
  13. 35ratbstr
    Joined: Feb 18, 2006
    Posts: 490

    35ratbstr
    Member
    from Colorado

    You cant beat the combination of GM oil supplement and Lubriplate. Lubriplate can be purchased in a variety of weights. I had alot of Circle track engines that were always broke in with both mentioned above and always had great results. I had one engine builder ask me if i wanted to rerun the bearing on a freshen up. He couldnt belive how they looked. I actually told him about the lubriplate!
     
  14. lolife
    Joined: May 23, 2006
    Posts: 1,125

    lolife
    Member

    yea you can.

    Joe Gibbs breakin oil. No supplement needed. Supplements and oil have to be pre-heated to mix properly.
     
  15. johnnykck
    Joined: Dec 22, 2005
    Posts: 1,025

    johnnykck
    Member

    Valvoline VR-1 racing oil has plenty of ZDDP. I also add a bottle of STP, the red bottle not the blue bottle. The red four cylinder formula has more ZDDP. I've not had a cam failure yet.
     
  16. man-a-fre
    Joined: Apr 13, 2005
    Posts: 1,311

    man-a-fre
    Member

    Was using brad penn penn grade exclusively but now using cenpeco has alot more zinc,heard thru the vine brad penn cut the zinc content,thats why i switched .
     

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