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Re: 5W-30 Transfer/Gearbox oil

it's the same scale..... 70w/80 is waaaaaaaay thicker than 5w30.

No it is not. 10w/30 engine oil is approximately the same specific viscosity as 75w/80.

Please do not post speculation as fact. It only serves to confuse. Please check your facts before posting in such a deffinite manner.

gas engine

oils are rated on the "S" scale (i.e. SA,SB,SC,SD,etc) with each higher > letter superceding the previous rating. (diesels are the same,

except using

"C" (C for Compression fired) instead of "S" (S for Spark fired). gear oils > are usually 50w or thicker and are rated on the "GL" (for Gear Lube) scale. > the MUA tranny and xfer case use 5W30 engine oil. >

Quality standards used above are those set by a trade body called the API. Viscosity standards are however expressed in terms of different scales for transmission and engine oils and these are governed by the SAE. It doesn't take a brain surgeon to check that these are the facts. For instance, and because their products appear to be held in high regard, this is a section copied from their web site:-

START MTL® Manual Transmission Lubricant a 70W80 GL-4 gear oil (SAE 5W30/10W30 engine oil viscosity) designed for use in manual transmissions and transaxles. Provides excellent protection of gears and synchronizers and its balanced slipperiness provides a perfect coefficient of friction, allowing easier shifting.

END

Huw

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Huw
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For

regard,

Sorry, forgot to mention the source, which is Redline Oil and the quoted text is from their gear oil section.

Huw

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Huw

Thanks all.

Paul C.

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Paul Cohen

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