According to tuners that we’ve spoken to, even engines with fairly big cams will idle at 13.0:1 air/fuel ratio and might be able to handle as lean as 14:1 air/fuel ratio at part-throttle. Much of this ...

For any engine to reach its maximum potential, the fuel must burn efficiently. Running rich or lean is not good for performance, and in extreme cases it can be catastrophic. A rich engine is likely to ...

As far as routine auto maintenance goes, it's common knowledge that changing your oil, rotating your tires, and replacing filters can not only lengthen the life of your engine but also help increase ...