I ve got mileage from big engined cars by this method. the car’s cubic capacity is from the 1242 cc fiat palio to some 1.6 machines and its a simple tip whoich u can try and feel the difference.
1st of all mostly these cars come witha tachometer so plz make sure teh idle rpm stays to the recommended level and plz read the booklet for christ’s sake
make sure the rpm doesnt exceeds 2500rpm at any instant.
and the time when these cars drimnk the most is the cold start. well to prevent taht there is a small tip which most people might be using. and that is after putting teh car I teh 1st gear dont press the accelerator else just very softly release ur foot from teh clutch paddle. just let teh torque of the engine rolle the wheels and this technique is veryhelpful and u should always practice it while reversing and the 1st start in the morning.
and the quality of fuel shoudl aways be mainatned and the injector cleaners also help alot liuek teh iftex and others u can get them from any petrol pump