Using a fuel other than the one recommended by the manufacturer to save money:
En español: Usar un combustible distinto al recomendado por el fabricante para ahorrar dinero:
A
Is a good way to save fuel
B
Can seriously damage the engine
Correct answer
C
Does not affect the engine at all
D
Improves engine performance
Why this is the correct answer
It is a false saving measure: using the wrong fuel can seriously damage the engine, with repairs far more costly than the supposed saving.
Topic:
Safe and Economical Driving