See also:

Safety
The 2007 Nissan Altima received a Good rating — the highest possible — in the Insurance Institute for Highway Safety's frontal-offset crash test. As of publication, IIHS hasn't subjected the A ...

Octane rating tips
Using unleaded gasoline with an octane rating lower than recommended can cause persistent, heavy “spark knock”. (Spark knock is a metallic rapping noise.) If severe, this can lead to engin ...

Three-way catalyst
The three-way catalyst is an emission control device installed in the exhaust system. Exhaust gases in the three-way catalyst are burned at high temperatures to help reduce pollutants. WARNING &# ...