We can conserve fuel by:- using CNG
2 by using bycycles or try our best to walk for short distances
3 we should try to do car pooling and use public transport
4 we should get our engines checked every 6 months so that they do not emit black smoke

Hope this helps you and plssssss give me the best answer as in need to be expert
Your driving habits have a direct impact on your car’s fuel consumption. Planning your travel, following speed limits, maintaining safe following distances and paying attention to traffic, weather and road conditions will keep you safer