a total original 2001 from rawalpindi should me more than that.
for vibration, the causes can be, 1-Engine needs tuning, 2-broken engine mount 3- loose screw in dashboard or something broken. specially check bolts in middle of dashboard under the deck.
this average is low. car dhuwan deti hai? masla carburetor main lagta hai.
for better performance use 5w-30 oil. i have used shell helix hx7 5w-30 and it engine gives much better performance and economy. but for longer engine life 20w-50/15w-40 oil is better .