I guess you can go to Lahore & Isb without any worries if your Clipper is perfect. Just get a pre-check of your oil, air filter, brakes, tyre condition, radiator & suspension. My friend took his family on a 1+ month long vacation in his Daihatsu Hijet from Karachi to KPK & never faced any issue.
These are great alternates for the outdated BOLAN & they give you a pleasure of driving a car due to their silent engine, auto transmission, soft & smooth ride.
Goodluck with your Nissan.
You may use the same oil used by the previous owner. My friend & I use Zic for our cars.
Kindly share your experience about your Clippers fuel consumption in city with AC, maintenance & performance. My uncle is greatly interested to buy one so your experience will be high valuable.
Thank you.