See also:

Fuel Formulations
Do not use gasoline that contains lead as a knock inhibitor, and do not use lead additives. Besides damaging the exhaust emission control systems on your vehicle, lead has been strongly linked to ...

Driving dynamics: engine
The second-generation, 2.4-litre, five-cylinder, diesel D5 is a cleaner and more advanced version of the engine fitted to the outgoing XC70. It gives superb performance (130mph) allied to fuel eco ...

How do states use OBD II for emission inspections?
Many states connect a computer directly to a vehicle's OBD II system. The inspector can then read "faults." In some states, this type of inspection has replaced the tailpipe emission ...