Brother Mobil Delvac MX is available in 50L drums in Gulshan-e-Iqbal Block 13D at Bedford truck station and lubricant centres.
I think they will give u close to Rs.500/L. Its a very close call between Delo Gold Ultra and Mobil Delvac.
Use whatever Xulfiqar bhai will favour as long as I know Delo Gold Ultra is his favorite (atleast in Pakistan).
No one would believe me but I am using Delo gold ultra in my 1988 Accord after Xulfiqar bhai suggestion since 5 years and also in its manual gear oil and it running like a gem soundless even after 280,000 km.
LiquiMoly and korean brands like KIXX/ZIC etc dont know how to make diesel engine oils Chevron and Mobil has a century old legacy.