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  1. #1
    Ashley g's Avatar
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    Does gearbox/transfer box and rear diff oil have to be fully stnthetic?

    As above really! I'm going to be changing the gearbox and transfer box oil on My 8L S3 tomorrow and was just wondering. I've got 25l of semi synthetic 75w 90 at work so would be handy if I could. Would this be OK for the rear diff too?
    Does it really have to be a fully synthetic oil?

    Many thanks, Ash
    2003-03 8L S3 Dolphin grey - Porsche 996 calipers - Mo-vit 325mm 2 piece front discs - 15mm spacers all round - Miltek resonated cat back - Genuine RS4's - Vredestein Sessanta's - Forge 007p - Forge TIP - JR cone filter - Poweflex diesel dog bone bush - AMD Remap - Blue Haldex controller - FK AK Coilovers - Seat Leon Cupra R top mounts - 8P S3 gear knob and gaitor - TT pedals - Neuspeed quick shift - LED number plate bulbs



    14.2 quarter @ 97 mph

    Power? 241 bhp with a boost leak, now fixed

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  3. #2
    Broken Byzan's Avatar
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    It's supposed to be sealed for life, so any new oil will be better than the rubbish in it.

    I have deffo used semi in cars with no problems at all

  4. #3
    Ashley g's Avatar
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    So semi synthetic will be ok? Can anyone confirm this? Ta
    2003-03 8L S3 Dolphin grey - Porsche 996 calipers - Mo-vit 325mm 2 piece front discs - 15mm spacers all round - Miltek resonated cat back - Genuine RS4's - Vredestein Sessanta's - Forge 007p - Forge TIP - JR cone filter - Poweflex diesel dog bone bush - AMD Remap - Blue Haldex controller - FK AK Coilovers - Seat Leon Cupra R top mounts - 8P S3 gear knob and gaitor - TT pedals - Neuspeed quick shift - LED number plate bulbs



    14.2 quarter @ 97 mph

    Power? 241 bhp with a boost leak, now fixed

  5. #4
    beanoir's Avatar
    Sharpest Tongue in the West

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    yep, semi synth is fine.
    Porsche Cayman S |Jeep Grand Cherokee|1988 Ford Fiesta XR2

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  6. #5
    SiGainey's Avatar
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    seconded. Syntrax in mine with no issues
    '01 AMK, completely standard except for the Ambient Lighting Pack.

 

 

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