[sammyg2]

Now hold on just a darned minute.
This morning on the radio a jiffy-lube ad said I'd get a 10% increase in mileage if I let them change my air filter.
They also said that if I paid them to change my oil and check the pressure in my tires, along with a new filter I'd get a 15% increase in mileage.
jiffy-lube would never lie to a customer.