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Saturn says the 2004 Vue can accelerate from 0 to 60 mph in just 7 seconds, which is pretty quick (and about 1.5 seconds quicker than the 2003 model). Yet EPA fuel economy ratings remain unchanged (19/25 mpg for the AWD V6). Variable-valve timing enhances high-end power, low-end torque and fuel economy.
The sensing ability of a Saturn oxygen sensor can be affected by altitude, air and engine temperature, barometric pressure, engine load and some other aspects. A Saturn that's equipped with a gasoline engine has a perfect ratio of fuel and air of 14.7:1. Imperfect fuel and air ration results to black smoke from the exhaust, smell of rotten egg, and/or poor mileage. But there's actually no specific or standard perfect ratio for all vehicles.