Zinc additive on initial break-in...yea or ney - Team Camaro Tech
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post #1 of 6 (permalink) Old Jan 3rd, 09, 10:25 AM Thread Starter
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Mark
 
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Zinc additive on initial break-in...yea or ney

I had planned on using the Zinc additive in my 350, but wasn't sure if I should wait until after the 500 mile break-in period on the motor. (I'm rebuilding it now). On one hand, you're supposed to use non-detergent oil for the break-in. On the other hand, seems like zinc might actually help reduce damage to the bearings and cam during those first few critical minutes. What do you think?


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post #2 of 6 (permalink) Old Jan 3rd, 09, 10:45 AM
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Re: Zinc additive on initial break-in...yea or ney

Zinc additive is CRUTIAL for initial breakin and if you don't use it, you might as well put a brick on the gas pedal when you start it and let it explode... because you will be starting over either way ... Do a search for zink above to get some info... here's one I posted awhile back...
https://www.camaros.net/forums/showthread.php?t=146068

Sometimes it's better to let someone think your an idiot, than to open your mouth and remove all doubt...

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post #3 of 6 (permalink) Old Jan 3rd, 09, 04:03 PM
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Re: Zinc additive on initial break-in...yea or ney

I have fired up new motors without Zinc additives or anything else except for valvoline 30weight or 10W30 and all my stuff runs fine, pulled flat tappet cams and all of the lobes and lifters look perfect, I can post pics. It is good practice to use it and I probably should have but it is not necessary.
You couldn't pay me to run lucas or any other crap through my motor, zinc would be a wise choice though.

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post #4 of 6 (permalink) Old Jan 3rd, 09, 07:32 PM
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Re: Zinc additive on initial break-in...yea or ney

I was told by my engine buillder to start up with Rotella and after the 30 minute break-in use Valvoline with a bottle of ZDDP additive. I drove the car all summer and it runs like a watch.

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post #5 of 6 (permalink) Old Jan 3rd, 09, 07:57 PM
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Re: Zinc additive on initial break-in...yea or ney

With the latest formulation of engine oils, zinc additive is very important for any flat tappet cam. The more aggressive the cam, the more critical it is to preventing failure.

I personally do all break-ins with Rotella & a bottle of GM EOS.
In fact, I still run the same oil & EOS in my Camaro after break-in.
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post #6 of 6 (permalink) Old Jan 3rd, 09, 08:22 PM Thread Starter
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Re: Zinc additive on initial break-in...yea or ney

Is Rotella non-detergent? I bought non-detergent oil, because that's what my shop teacher 27 years ago taught me. I've never added zinc when I've rebuilt a motor, and have never had problems, but I will add some this time on start-up.


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