I was chaanging the gearbox oil on the wifes Rover 416SLi yesterday and when I came to check what was the required spec of oil, the haynes manual said, 10w 30 or 10w 40 engine oil.

 

So I checked to see what type of engine oil it said to use, in the hope that they have made a typo but it said the same plus a bit more info, so there wasn't a duplication error.

 

So after calling a friend asking them if they had ever heard of putting engine oil in to a gearbox, they said "No"....so I called Rover and low and behold, they said, "Yes, you can use either said engine oil or 75-80 gearbox oil".

 

Whatever next. I thought engine oil could not cope with the thrash from a gearbox due to the shearing.

 

Oh well, decided to stick with the gearbox oil anyway but you learn something new everyday.

Yeah some cars share the same oil I believe. Odd.

But thats just it, the box and engine sump are separate.

One of the changes to do on a Cossie T5 box, was to put MOBIL Fully Synthetic engine oil in.

 

Must admit its not a regular occurence though.

 

Leigh

 

 

yup, some gearboxes use engine oil

 

years ago when i worked on fiat/lancia's - they used engine oil in theirs.

 

some mercedes manual cogboxes use ATF!!!

 

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I feel the need, the need for speed!

 

It sounds reasonable. I know they're smaller engines an' all, but bikes share the same oil for the 'box and the rest of the up and downey bits. As for shear, well lots of modern bikes rev to over 14,000rpm and top out at over 160mph! (200mph if you buy a 'Busa and change the filter, can, pull mirrors back and don't have breakfast)