HI, I own a 94 Three door pajero (swb) Engine 4d56. I think its also known as 2.5TDi. Its nonturbo or intercooled. This is how the treatment was conducted:
I was called in 500 km's before an oil change was due.
1.They replaced the oil filter and poured Liqui moly Engine flush plus. and ran the engine on idle for 20 mins.
2. The oil was drained.
3. New Genuine oil filter was put in.
4.New Liqui molly oil was poured in .
5. Ceratic 420 ml was poured in.
6. The fuel tank was filled up and liqui moly diesel purge was put in.
All of this was done at a third party workshop. ( suzuki township motors Service center.
The lube shop is based in Lahore . I can share Mr. Ali guls number if you like . Once you call him and he will consult with you on what you need etc. Then he will bring the products to a workshop of your choice or his if its convienent for you.
I hope this helped.
Attached is a pic of my pajero for your reference