There are only three reasons why you would replace your Prius spark plugs: for scheduled maintenance, to squeeze extra performance and gas mileage, or for both reasons! Pulstar Pulse plugs give you better fuel economy, reduced emissions, and a much more efficient engine. It's been proven! Sold as a set of 4
You can improve your gas mileage and reduce overall emissions in your Prius by using a Voltage Stabilizer such as this by NRG Innovations. Voltage stabilizers work by using it's own reserve when there are fluctuations in power flow in between your Prius' electrical components and 12 volt battery. In turn, it also improves overall performance and efficiency.