| : WHERE TO YOU FIND 600W GEAR LUBE? While we are on the subject of gear oil, I have done some research in the past on the subject and found the following.
I spoke to a lot of vintage race car mechanics because that is one of my interests and also my son has run vintage race teams and restored a lot of that type of car. Many of the cars of the thirties as you all no doubt know were FORD based. I got all kinds of advice that was as far apart as the moon and Jupiter. Any way I ended up talking to a product engineer at Lubriplate. They produce gear oils for all types of transmissions but most importantly for some that use the old engineering prinicples and no synchro rings etc. As in "they haven't changed this box for years". Also Lubriplate is ISO 9000 certified so if I found a product that they produce, I would know that their methods of manufacture are OK. I learned:
600W is not a viscosity rating. It is a trade name of sorts originated by Mobil. It simply became universally used. The book (old and yellowing)that my contact used listed three products. 600, 600W and Super 600. 600 was listed as a pure mineral oil equivalent to SAE 140W. 600W and Super 600 were compounded oils or oils that were thickened. They were roughly equivalent to SAE 250W. The oil we use today as 600W is supposed to be a compounded oil equivalent to SAE 250W. The oil that we sell here tested to be just that but you should be careful. We now use a Lubriplate product called SRO 288. It is equivalent to SAE 250W from a viscosity standpoint but has better heat disssipating ability and is more slippery. The additive that increases viscosity in some products tends to make it course. The SRO product clings well also and we know where the stuff came from. Lubriplate also has an SRO 277 which is equivalent of SAE 140W. It is not multigrade. We recommend it in newly rebuilt differentials and transmissions.
Use it for at least 1000 miles. It flows better when starting out and it does leak. I would not use the 140W in steering boxes. These Lubriplate products are available from many bearing and drive component retailers. We sell them here also. So ask me what time it is I'll tell you how to make a watch. Sorry to be so long winded but to me the more you know the better.
Ray C
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