If you are using a modern vehicle, never allow a mechanic to use an analog tester or a light bulb to test critical engine management components in your vehicle because a lot of damage can occur just by attempting to test.
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Fuel Economy
This section provides some data on fuel economy figures of vehicles by year, sites to visit for more information on fuel economy, where to get information on any fuel saving product in order to ascertain the validity of any claims such products might make and general tips on fuel economy.
