The analog generation (left) will find digital gauges (right) both confusing and strict when running on empty.
• don’t free-wheel, as the fuel injector shuts off while the car is in gear and you don’t step on the accelerator;
• limit fuel evaporation by parking in the shade and ensuring the cap seals tightly;
• don’t idle, switch off;
• ensure your tyres are inflated, harder is better; and
• keep the air filter clean.