Guest Jerry Moore Posted September 19, 2012 Share Posted September 19, 2012 In the Owner's Manual of my 1920 Overland it calls for "heavy steam engine oil" for the differential (rear-end). What type and weight oil is this and what oil on the market would be its equivalent? Thank you! Link to comment Share on other sites More sharing options...
Bill Boudway Posted September 19, 2012 Share Posted September 19, 2012 That would be 600wt steam cylinder oil. I'm not sure what the modern weight designation is.Available from Mac's Auto Parts, or any lube oil distributor. I bought a 5-gallon pail from our local distributor last year, and hope that it will last a lifetime in our Chrysler. Link to comment Share on other sites More sharing options...
Mark Shaw Posted September 20, 2012 Share Posted September 20, 2012 SAE 250 WT is the modern equivalent.... I use shell Dentax or Texaco Thuban Link to comment Share on other sites More sharing options...
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