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More on oil

Discussion in '80-Series Tech' started by landtoy80, Jun 20, 2003.

  1. landtoy80

    landtoy80

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    80/90 for the diff
    75/90 for the t-case
    I see some are using Mobil 1 gear oil 75/90 in diff's. Could there be a problem using 75/90 in the diff's? Mobil 1 75/90 flows like water and 80/90 is a lot thicker.
    I use Mobil 1 75/90 in t-case.
    Amsoil 80/90 in the diff's.

    I was thinking of using Rotella T 5w40 snthetic oil but it is summer and the 5w is borderline for WI temp.If I was in AZ the Rotella tech said 5w is to low. I will wait till fall and use it. Rotella is a diesel but works for autos too. I use Mobil1 10w30 but should go to a 10w40 for summer. With 220,000 mi maybe I should have 50 for summer???
    kurt
     
  2. Hltoppr

    Hltoppr SILVER Star

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    FWIW I never go below 10 weight, even up in Flagstaff. If I go to Phoenix, at 106-120 degrees F, it's just too darn hot down there for anything less, even if I could get away with it up here.

    -H-
     
  3. Eduardo96FZJ80

    Eduardo96FZJ80

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    -H-
    Is the heat and air quality being effected by the wildfire in AZ?
     
  4. landtoy80

    landtoy80

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    5w is for use guys that see -20f. I bet all the nonsnow birds would die if it got that cold down there. :killtard:
    kurt
     
  5. Hltoppr

    Hltoppr SILVER Star

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    When the wind shifts to NW we get a lot of smoke from the fires to the South and South East. The entire town smells like a huge campfire...

    Great on the contact lenses. :-/

    -H-
     
  6. Eduardo96FZJ80

    Eduardo96FZJ80

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    -H-
    Bummer! :(

    Kurt,

    -20f :eek: and i was complaining about the rain (drizzle)this morning on the way to work!!
    I even had to put on some socks with my sandals :G
    Eduardo
     
  7. Guest

    Guest Guest

    SAE LS90 in Diffs, Gearbox and Transfercase.
    ATF DextronIII in Power Steering Box.
    Castrol GTX2 20W/50 in 1FZ-FE all year, Changed every 10,000km or 6 Months - What ever is first. :urinate:
     
  8. landtoy80

    landtoy80

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    LS90. What does the LS stand for?
    20w50 year round, you must live in Paradise.
    Gearbox? We don't get a gearbox in USA.

    We get a 'hydraulic pump that no one knows how it works/no one can work on, that changes gears so that you can hold a cell phone in one hand and hold a of cappuccino in the other, which has a cable on it that connects to the throttle that is not the same one that is in the service manual, that changes gears your you'.

    My diff's call for SAE90 above 0 f
    SAE80 or 80w-90 for below 0 f
    I never seen 80W and 90 would be hard to find.
    When I go to the parts house and ask for 75w90 the parts guy look at me and says 'theirs no such oil like that'. I was there the other day and he had it on the shelf. :tomatoe:

    kurt
     
  9. Guest

    Guest Guest

    Limited Slip as in L.S.D.(Limited Slip Diff). :stupid:
    I Use LS90 instead of SAE90, Becouse there is a L.S.D. in the rear and is easier to have 1 type of Gear Oil. :givemebeer:
     
  10. BigMac

    BigMac SILVER Star

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    This discussion of how oil viscosities compare, and which is best for hot temps made me look for some more info on the subject. Here are 2 very detailed (and hopefully technically accurate) articles. http://www.howstuffworks.com/question164.htm

    http://auto.howstuffworks.com/frame...http://www.vtr.org/maintain/oil-overview.html

    The charts that compare viscosity of gear oil to crankcase oil were new to me. 75W-90 pretty well equals 10W-50, and 80W-90 similarly equals 20W-50. See: http://www.superiorlubricants.com/classtable.html
     
  11. Beowulf

    Beowulf

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  12. Jim_Chow

    Jim_Chow

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    I'm running M1 Delvac (5w40) down here in Tucson. It was designed for truckers who drive from Texas to Alaska...works fine. Got 2 gallons of Rotella T synthetic (5w40) ($14/gallon at WalMart) since the Delvac is kind of pricey ($26/gallon at the Petro Lube). At the Petro Lube truckstop, I noticed they sold primarily Delvac (both synth and dino) and rotella (both synth and dino).

    I'm sure glad the wind's coming out of the south...keeps all that smoke out of here. :)
     
  13. Guest

    Guest Guest

    All new Diesel Engines that are mainly used on the Highway, Should be able to go until 1,000,000km before requiring a rebuild. With Engine Oil, Oil Filter, Fuel Filter and Air Filter done every 40,000km(Even btter with a ByPass Filter :D). :urinate:

    If it were possible to fully filtrate Oil, Mineral Oil would last for ever, But Synthetic Oil will wear out over time(less than 20,000km) and will separte if it goes over about 115 Celcius.