C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Red Line Oils

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Old Sep 25, 2002 | 07:29 AM
  #1  
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jtfrog
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From: Auburn ca
Default Red Line Oils

I am ready to change my differential oil and was thinking of replacing it with 75w90 redline gear oil wich already has the limited slip adtitive. The original gear lube is 80w90. Is redline a good substitue? Is the redline oil a thinner weight?

Jtfrog 1986 totally stock, well exept for K&N filter
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Old Sep 25, 2002 | 07:47 AM
  #2  
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From: Ft. Worth Texas
St. Jude Donor '11
Default Re: Red Line Oils (jtfrog)

I used the 75-90 in my diff fluid change with no problems, but I still added the GM additive.

jeff
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Old Sep 25, 2002 | 08:39 AM
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Default Re: Red Line Oils (jtfrog)

If the redline oil already has the addative in there is adding the gm addative going to be to much?
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Old Sep 25, 2002 | 10:09 AM
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Default Re: Red Line Oils (jtfrog)

I initially didn't add any additive, but my car 'cried' when I went around a corner. I added a little redline additive and the rear end was quiet again.
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Old Sep 25, 2002 | 06:49 PM
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Default Re: Red Line Oils (dgoodhue)

i used the redline 75-90 and one small bottle of GM additive, my rear end works better than ever.
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Old Sep 26, 2002 | 12:15 AM
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Default Re: Red Line Oils (jtfrog)

I'm using the Red line Heavy Shockproof oil with a bottle of Red Line friction modifier.

In fact I'm running Red Line for all my fluids. 10W30 for the motor and MTL in the ZF trans and Water Wetter with Zerex coolant in the cooling system.
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