2005 G6 GT 137k miles 3.5L, bought at auction. Drove it home, no engine noise but leaking a lot of oil, gasket or blown motor?
Not possible to answer due to the so many variables. Most experienced drivers tend to use RPM and not MPH as guidelines. Why?
Because torque, the power of the motor as transmitted to the wheels via the transmission is a function of RPM. Accelerating into an interstate versus going from light to light in a city demand different techniques.
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