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Thread: Rear end oil

  1. #21
    Senior Member 98TransAmWs-6's Avatar
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    Black/ Silver
    98 TA WS6/ 01 C5 Corvette

    I use vavoline 75w-90 full synthetic with the Limited Slip additive. I had the noise coming from the differential and changed the oil with this and it was like a night and day difference, no more noise.

  2. #22
    Senior Member 98maro's Avatar
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    00 camaro ss M6 #6695

    What's the difference from 75/90 and 80/90?

    On the link I was reading says I could use synthetic Or regular oil.
    00 ss blk m6 " STOCK" strano springs, slp bilstein shocks, adj LCA, adj panhard bar, relocation brackets, 2 point SFCs welded,OEM zo6 rims black, magnaflow exhaust, CME exhaust,E/cutout, slp grille, custom front plate mount, HIDs, whistler mod, side moldings delete, slp air lid, ported and polished TB, strut tower brace, 3.73s gears, and some other parts to list!
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  3. #23
    Retired NOT tired SteveC's Avatar
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    2001 Z28 (Sara)

    Quote Originally Posted by 98maro View Post
    What's the difference from 75/90 and 80/90?

    On the link I was reading says I could use synthetic Or regular oil.
    The first number of the oil is the viscosity when cold, the second number is the viscosity of the oil when hot.

    The 75/90 is a little thinner when cold than the 80/90, IT DOES NOT MAKE A DIFFERENCE.

  4. #24
    Senior Member 98maro's Avatar
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    00 camaro ss M6 #6695

    Ok thank you.
    So I'll be ok with 80/90 if is not much diference.

  5. #25
    Auto Painter RyanJM's Avatar
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    1998 Trans Am

    I have used red line and mobil 1 plus the GM additive both worked the same for me just bough what the auto parts stores had there.

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