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break-in and EOS

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Old Aug 4, 2008 | 09:35 AM
  #1  
91formulaSS's Avatar
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From: Lowell, MA
Car: 91 Formula, 95 GT
Engine: 5.7, 5.0
Transmission: T5, T5
Axle/Gears: 3.42:1, ???
break-in and EOS

I know it's needed for a flat tappet break-in, but is there any benefit using EOS for a roller motor break-in? This is for a ZZ4. I read in the GMPP catalog that it should be used during break-in with all of their new cams regardless of tappet design. But the break-in procedure for my motor doesn't mention it. It says to just use 10w30 conventional. any thoughts? Thanks.
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Old Aug 4, 2008 | 04:31 PM
  #2  
Apeiron's Avatar
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Joined: Jan 2000
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: break-in and EOS

It's probably similar to the reason why the shampoo bottle says "Lather, rinse and repeat.
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Old Aug 5, 2008 | 01:49 PM
  #3  
91formulaSS's Avatar
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Joined: Feb 2004
Posts: 542
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From: Lowell, MA
Car: 91 Formula, 95 GT
Engine: 5.7, 5.0
Transmission: T5, T5
Axle/Gears: 3.42:1, ???
Re: break-in and EOS

think I'll use it anyways.......unless anyone can think of a good reason not to?
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Old Aug 5, 2008 | 02:51 PM
  #4  
Sonix's Avatar
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Posts: 10,763
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From: Calgary, AB, Canada
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
Re: break-in and EOS

Waste of money?
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