synthetic oil bliss

[Stephen Bigelow]

Last oil change he switched from Mobil 1 10-30, to Castrol
> 5-50 thinking it would be easier on the car a start-up. I would agree.
But,
> a few weeks ago he started getting lifter noise at idle once the motor
> warmed up!? Turns out the oil wasn't think enough when hot... ...he
switched
> back to 10-30, and the problem has been fixed.
>
> weird huh?

Yes, especially in light of 50 being thicker than 30 when hot.