Northern Auto Tech - ECU and Blue & Me Repairs

Technical Stilo gearbox oil

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Technical Stilo gearbox oil

Try reading your owner's manual! 75W-80 synthetic. Just under 2 litres required I believe. But in any case it's self levelling, you just keep filling until oil dribbles out of the fill plug.
 
Many thanks for your replies. There's some inconsistencies in the available information though:

The car manual and Autodata both state the oil type as 75W80

I was in both my local motor factors and Halfords earlier on. Checking their lists for their oils say it should be 75W85 / GL5 oil. The 75W80 is GL4.

Naturally I'm minded to go with what the car manual says, but I'd be interested in other opinions on this.
 
Wikipedia:- Gear Oil said:
API GL-4. Oils for various conditions - light to heavy. They contain up to 4.0% effective anti-scuffing additives. Designed for bevel and hypoid gears which have small displacement of axes, the gearboxes of trucks, and axle units. These oils are standard for synchronized gearboxes, especially in Europe, and may also be recommended for non-synchronized gearboxes of US trucks, tractors and buses and for main and other gears of all vehicles. GL-4 oils may also be used in many limited-slip differentials.

API GL-5. Oils for severe conditions. They contain up to 6.5% effective anti-scuffing additives. The general application of oils in this class are for hypoid gears having significant displacement of axes, generally non limited-slip differentials. They are recommended as universal oils to all other units of mechanical transmission (except synchronized gearboxes specifying GL-4). Some GL-5 oils in this class, which have special approval of vehicle manufacturers, can be used in synchronized manual gearboxes
Click to expand...

does this clear it up?
 
From the Stilo eLEARN workshop manual.
.
 

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put simply GL4 is more suitable for gearboxes, GL5 is more suited to Diffs.

some manufacturers specify GL4/5 for use in their boxes BUT as a general rule GL5 is designed for 'non syncronised' gear arrangements.

its all to do with the way the oil can handle torque transmission. as you may know the oil coats the gears. this coating aids with transmitting turning forces as well as, obviously, lubricating. depending on how the box was designed it will need a certain type of oil for it to work as the designers intended. for stilos its GL4.

also GL4 and GL5 have different additives for gear preservation. GL5 is less suited to 'synchromesh' boxes because its additives actually promotes premature wear of softer metals in your box i.e. the synchro rings that control shaft speed when changing gear.

Any clearer?
 
Much clearer for me, so this Castrol Syntrans Transaxle 75W-90 GL-4 should work just fine, great!

Do you know the tightening torque for the filler and drain plug?
 
Because they recommended me that one at the store and I also checked in the Castrol website and they also recommend that one. Could it create a problem if I put the 75w90 in?
 
osvaldocm26 said:
Because they recommended me that one at the store and I also checked in the Castrol website and they also recommend that one. Could it create a problem if I put the 75w90 in?
Click to expand...

You can...but your gearbox won't like it. Gear changes in the winter will be very stiff until the gearbox has warmed through. I know, I tried it and very quickly went back to 75W80.
 
Yellow Peril said:
You can...but your gearbox won't like it. Gear changes in the winter will be very stiff until the gearbox has warmed through. I know, I tried it and very quickly went back to 75W80.
Click to expand...

It was good that I asked for info here then, as everywhere I checked and asked the 75w90 was recommended (including some posts in here), but in the car manual it said that 75w85 should be used and in the workshop manual was the 75w80.

But anyway, I returned the oil I had bought but they didn't have the right one on stock, so have to wait a while.

That's why I love this forum, it had saved me from many potentially expensive mistakes ;)
 
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