Question

What
of oil
are
and
affect
fuel​

Answer 1

memtion the question clearly

Answer 2

Answer:

Running an engine on old, sludgy oil will cause a decrease in fuel economy. ... Without the right viscosity, the oil loses the essential ability to get where it needs to go in the engine. The engine runs hotter and less efficiently, robbing the engine of both gas mileage AND horsepower.

Regards