"R. P." > wrote in message
...
> "jim beam" > wrote:
>> you definitely have a point regarding oil quality affecting engine noise.
>> running ford oem 5w-30 in my civic, the motor sounded like it was five
>> fourth's ready to die. putting it back onto castrol gtx, she quieted
>> right up again.
>
> What is it about Castrol that makes it such a favorite with Honda
> service centers? I mean as log as -- say -- a Chevron brand oil has the
> same API rating that is specified by the Honda specs

API rating are a minimum.