@syncview @afarooqi
strange phenomena is noted during past 12000 km-
fuel average of daily mule has significant variation just by change of engine oil brand & viscosity.
over Addinol - 5W-30 40 liters rolled approx 285 - 300 kms engine feeling heavy - approx 5 tank fill and i was skeptical about plenty of factors. However found nothing switched back to Shell Helix 10W-40 for next 5000 kms 40 liters rolled 310-315 kms. - In July I made choice switching to AISIN 10W-40 2 tanks and she is running 325+ kms in 38 liters.
with engine oil prices soaring, have planned to run 7500 kms and top up if any sign of engine oil level drop. it is an old carb auto transmission Corolla 1300 2E 12 valve.
not sure what to say .. 
@Xulfiqar @rajaatta @dani_kk