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  • 600 W oil

    I see some confusion on what 600 W really is. One search states that the company originally making 600W was bought by Mobile years ago. Mobil offers Mobil - 1 Gallon Bottle, SAE 140 Mineral Gear Oil

    Viscosity (SUS) 30.6 at 100°C, 460 at 40°C Sq. mm/s, ISO 460
    Most vendors offer 600W by the quart, prices ranging from $7.50 to $10.30 I use Mobile industrial oils for the machinery in my shop and can buy a gallon of Moble 600W for $35.31 as Mobilgear 600 XP SAE 140. Is this the same stuff our vendors are selling by the quart?

  • #2
    I am not really sure, but I bought 5 galons of Meropa 680 12 years ago. Near a lifetime supply for $54. I could not justify the price of what the vendors sell a quart at a time. Seems to work well in the customers cars I have used it in. Alittle stiff in the cold until warmed up but few in this area drive in the winter anyway. Rod
    Much of the social history of the Western world, over the past three decades, has been a history of replacing what worked with what sounded good.

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    • #3
      I use 250 weight gear oil. I read some time ago that 600W was close to 250 weight oil. It makes shifting easier than the thin oil that some sell.
      Bill
      http://www.brauchauto.com/
      Eastern Connecticut

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      • #4
        I use the stuff from Brattons and never had an issue. That matters more to me then a few bucks difference here or there.
        3 ~ Tudor's
        Henry Ford said
        "It's all nuts and bolts"


        Mitch's Auto Service ctr

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        • #5
          Three parts 90w one part Lucas.

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          • #6
            Use the attached chart for viscosities. We've used SAE 250 mineral oils from Lubriplate, SPO 288 or SPO 299, which is supposedly similar to the the 1930's 600 wt. and appears much more viscous than 140 wt. Check out the website for all the products.
            Attached Files

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            • #7
              From what I looked at, depending on the chart, 600W is anywhere from about 180 to 240 weight.

              Just from what I've tried, 140 or 250 works just fine and its hard to tell any difference.

              When a kid we had gear oil by 55 gallon drums, 140 and 90 weight. In the old vehicles we used the 140. Never had problems or complaints that I remember. But, then we also kept a grease gun filled with 140 weight for enclosed old u-joints and steering boxes. [ thats actually what the grease fitting on the steering box is for]

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              • #8
                Originally posted by slammin View Post
                I see some confusion on what 600 W really is. One search states that the company originally making 600W was bought by Mobile years ago. Mobil offers Mobil - 1 Gallon Bottle, SAE 140 Mineral Gear Oil

                Viscosity (SUS) 30.6 at 100°C, 460 at 40°C Sq. mm/s, ISO 460
                Most vendors offer 600W by the quart, prices ranging from $7.50 to $10.30 I use Mobile industrial oils for the machinery in my shop and can buy a gallon of Moble 600W for $35.31 as Mobilgear 600 XP SAE 140. Is this the same stuff our vendors are selling by the quart?
                600w is a type of oil still sold by Mobil. It is also called steam cylinder oil. It is NOT a "weight of oil".

                "The Mobil Cylinder Oil brand of lubricants represents the earliest lubricant product marketed by our Corporation's predecessor companies. 600W Cylinder Oil was produced by the Vacuum Oil Company in the second half of the 19th century and was a breakthrough product of its time. Continual upgrading and application of the latest base oil and additive technology has maintained this product series as a leader in its application areas. While steam cylinder applications are now less common, the reputation of Mobil Cylinder Oils in worm gear applications remains unmatched among mineral-based products."

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                • #9
                  I use the 600 but I am wondering how often it should be changed in the gear box and rear. Or is it good for life.

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                  • #10
                    Factory lube chart recommends every 5000 miles for trans and rear end.

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                    • #11
                      What # 6 said. I use Lubriplate SPO 277 in the diff. Good product.
                      Brian W.

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