A full tank is often 40 to 60 litres in a car; see your car’s handbook.

Start from an example

50 litres of 95 petrol, at each brand’s listed price

This fill-up at each brand
BrandA litreThis fill-upWith the brand’s own discount
SPC$3.56$178.00–
Caltex$3.60$180.00$171.00
Shell$3.63$181.50$150.50

The dearest listed brand costs $3.50 more for this fill-up than the lowest. Each 10 cents a litre is $5.00 on it. Of it, $33.00 is petrol duty and $14.70 GST, at the lowest listed price.

Listed prices from each brand’s own page; the discounted price is the lowest the brand itself publishes, with its conditions. The conditions
Add a month of driving

About 1,500 km a month is 18,000 km a year.

Your car’s fuel use; the trip computer or the handbook gives it.

Data: Shell, Caltex and SPC (their own price pages); SingStat, checked 14 Nov 2026. Full table and method on Numbers.sg