Welcome.

From Page 11-23 of the genuine handbook Manual Transmission both

2wd 2.3 litres


and 4wd 3.4 litres:

https://mitsubishi-motors.co.uk/wp-content/uploads/2021/06/15MY-L200-Owners-Manual.pdf

Mitsubishi Motors Genuine MTF API classification GL-3 SAE 75W-85

Are you unable to purchase the genuine fluid where you are?

 

On man

Welcome.
From Page 11-23 of the genuine handbook Manual Transmission both 2wd and 4wd:

Mitsubishi Motors Genuine MTF API classification GL-3 SAE 75W-85

On handbook mitsubishi recommend gl4 70w80 but not telling anything about mineral or synthetic
All mitsubishi service in UK not working with mitsubishi original oil they use Morris lubricant

 

Have you looked at the Owners manual I linked to, and the page #?

The specified fluid that I found from the Owners Manual above is available in Australia:

MItsubishi Genuine 5L Manual Transmission Fluid 75W-85 GL-3 New

MItsubishi Genuine 5L Manual Transmission Fluid 75W-85 GL-3 New Part No: MZ320025 THIS IS A GUIDE ONLY. You Must Confirm Fitment With A Dealer / Manufacturer Prior To Purchase To Ensure This Will Fit Your Vehicle Or This Is A Non-Returnable / Refundable Item. This Item Is A Non-Refundable /...

halfpriceparts.com.au

I don't think my computer settings will work too well to find UK products as easily as Australia products.

It makes no mention if it is either mineral or fully synthetic.

 

This is recommendations from mitsubishi

 

What is the source for your image?

It differs to the genuine Owners Manual that I linked to.

 

I sent request to mitsubishi UK they sent me this

 

Have you gone to the link I provided in post #2?

 

Yes I do
I'm in United Kingdom here is not possible to find original mitsubishi oils here replaced with Morris lubricant