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Old 06-08-2007, 09:36 PM   #1
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Join Date: May 2007
Location: Detriot
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Car: 1986 firebird
Engine: 350
Transmission: THM350
Axle/Gears: 3.42

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Royal purple and flat tappet cams?

I have a older 350 in my firebird, and it has a flat tappet cam, I need oil with more ZDDP additive then todays regular 10w-30 which has about 600 when I need 1000 or more. dont need my cam wiping, lol.

The valvoline Vr1 oil has 1200 PPM per quart which is what I need but I have to order it, Ive heard good stuff about royal purple and I can buy it around me

Anyone know the Zinc content in their 10w-30 grade?
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Old 06-08-2007, 10:06 PM   #2
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Join Date: Mar 2005
Location: Hamilton
Posts: 1,171
Car: 1990 IROCZ Camaro
Engine: 350 4bbl, 200cc Heads, 270hr Cam
Transmission: 700R4 w/ Trans-Go shift kit.
Axle/Gears: GM 10 bolt Posi

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Re: Royal purple and flat tappet cams?

A buddy of mine just got done breaking in a motor with Shell Rotella T Diesel oil. Diesel oil has a higher amount of zinc in it and is good for breaking in cams. Royal purple is too expensive in my opinion to be used as a break in oil, seeing as you will be changing it out shortly anyhow.
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Old 06-08-2007, 10:10 PM   #3
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Car: '89 IROC-Z
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Re: Royal purple and flat tappet cams?

go with castrol HEAVY DUTY for break ins
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Old 06-09-2007, 12:45 PM   #4
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Join Date: May 2007
Location: Detriot
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Car: 1986 firebird
Engine: 350
Transmission: THM350
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Re: Royal purple and flat tappet cams?

Quote:
Originally Posted by Rayzor32 View Post
go with castrol HEAVY DUTY for break ins
my engine is aleready broken in, it gots a little over 8000 miles aleready. Sorry for not saying it earlier.

But does anyone know if RP regular 10w-30 oils have good anti wear for flat tappet cams?
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Old 06-09-2007, 12:45 PM
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