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Thread: Diff Oils - Castrol SAF-XO - 75W/90

  1. #1
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    Diff Oils - Castrol SAF-XO - 75W/90

    I got to do a basic oil service on my car tomorrow and going to head out soon to buy oil filter.

    Also my diffs are overdue on my revised service interval so I will do them also - no e-diff. Normally I can hunt around and find Castrol SAF-XO - 75W/90 spec grade oil but I dont have the time today.

    What is the "agreed" alternative that I can get at Supercheap/Repco/Auto 1/Bursons?

    Thanks

    Garry
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  2. #2
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    Penrite Progear 75W90 PRO GEAR 75W-90 (Full Syn.) | Penrite Oil Supercheap and Repco will stick it.
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  3. #3
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    Castrol's website shows Castrol Syntrax Longlife 75W-90 is the replacement for the SAF-XO

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    Unhappy

    Quote Originally Posted by kelvo View Post
    Penrite Progear 75W90 PRO GEAR 75W-90 (Full Syn.) | Penrite Oil Supercheap and Repco will stick it.

    That's what I've just put in mine front and rear (no E-diff for me so this does both) - excellent stuff.

    I also just put in the Royal Purple Synchromax into the Transfer case and no issues so far. Been about ~60,000km since the last Transfer Case oil change.

    RP is also available from SCA (on line order only - they don't carry it in store here in WA)

    Cheers

    Eric

  5. #5
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    Castrol Syntrax Long Life, Penrite Pro Gear, Motul Gear 300 (Canberra Motor Cycle Centre) Shell Spirax S6 AXME, Caltex Delo SynGear XDM

    Take your pick.

    Shane used Pro Gear and experienced elevated Fe levels but that can happen when a new oil/add package is introduced.
    It will tend to displace the old sulphur/phos additive package along with I'm guessing bits of asperites.
    In not sure if he dumped it or continued to measure a trend as generally the Fe levels drop and taper off in that situation.

  6. #6
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    Quote Originally Posted by rick130 View Post
    Castrol Syntrax Long Life, Penrite Pro Gear, Motul Gear 300 (Canberra Motor Cycle Centre) Shell Spirax S6 AXME, Caltex Delo SynGear XDM

    Take your pick.

    Shane used Pro Gear and experienced elevated Fe levels but that can happen when a new oil/add package is introduced.
    It will tend to displace the old sulphur/phos additive package along with I'm guessing bits of asperites.
    In not sure if he dumped it or continued to measure a trend as generally the Fe levels drop and taper off in that situation.
    Cant recall at what point I mentioned on the forum regard the FE levels. But I've so far had 3 samples on both the front and rear with a change in the middle. Last samples where improved compared to the first sample which was around half the kms. Using the progear still and haven't changed oil brand/type. Next sample will be more of a comparison with the first as the kms on the oil will be similar
    15-10-2018 3-06-38 PM.png15-10-2018 3-05-53 PM.png
    Shane
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  7. #7
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    Thanks for the responses - I went for the Penrite as it was handy.

    Cheers

    Garry
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1976 Jaguar XJ12C
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
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    Is it ok to use the Penrite ProGear in the transfer case?

  9. #9
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    Quote Originally Posted by Hungo View Post
    Is it ok to use the Penrite ProGear in the transfer case?
    No, I think the Royal purple is the only non OEM fluid I would use.
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  10. #10
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    A little knowledgeable bird on here did think that Rock Oil TF870 is the same as IYK500010, 'special transfer case fluid.'

    But to save $40 every couple of years in using another product, in my view the 'special transfer case fluid' is the way to go.
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1976 Jaguar XJ12C
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

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