Newey West autocorrelation

#1
May I use Newey West procedures when exists only autocorrelation? or I just can use Newey West when exists both autocorrelation and heteroscedasticity?

Any feedback you could give me would be greatly appreciated.
 
#2
Hi, as far as I know you can use it in any case homogeneity or independence or both are violated in an OLS regression, i.e., if residuals are heteroskedastic and/or autocorrelated.