...some sort of Mobil 75 single viscosity oil that says on the label that it replaces, and will provide superior fuel economy to, the BV 75w80 and is suitable for all PSA vehicles manufactured in Europe. It has a Peugeot/Citroen logo on the bottle, and I had this discussion at a Peugeot dealer.

Now I do recall discussions some time ago that the gearbox on these cars is sensitive to the gearbox oil used, and the factory stuff was the best. But this official replacement is a different viscosity to the one originally specified for these cars. The only other thing he had was a Nissan 75w80 gearbox oil.

I'm thinking that the single grade will be thinner when hot, probably where the claimed improvement in fuel economy comes from. I'm wondering how will this affect a 120K mile gearbox?

Has anyone else had this conundrum, and if so what did they do. I warned him I'd take advice and might bring it back.

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Cherry Rallye SOLD

its the additives in other oils that cause issues, the new o.e oil is intended for all be boxes.

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need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

oh and total still do loads of 75w80 bv oil if there are any motaquip factors in the area

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need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

This.

Works great in mine.

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone

Engine sump plug washer and box plug washers are different sizes. The box one plug is larger, I found this out after removing the plug and dropping the oil

Engine sump is 14mm and box is 16mm.

205 sump plug washer is 16mm

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'90 1.6 205 GTi, '98 306 GTi-6