POSTED: Tuesday, April 10, 2012 - 9:00am
UPDATED: Tuesday, April 10, 2012 - 9:10am
NBC NATIONAL NEWS — There are a lot of cars on the road and most take regular gas.
But people who use premium gas are paying much more to fill their cars up.
While some people may be tempted to pay for a lesser grade of gas, it's not always a good idea. Especially if the owner's manual states high octane premium is required.
"You don't have a choice. It's not optional. If it's a need, you got to have it, " said David Preciado, Southwestern College Auto professor.
But what if the owner's manual says premium octane is not needed but recommended?
Southwestern College Auto professor David Preciado said it might be worth a little test.
"As long as your car does not ping or start knocking under acceleration, that's the biggest difference in the different grades," said Preciado.
By going from premium to regular the consumer will save money on gas but you have to watch your car's performance and that could impact your gas mileage.