re. Question for QLCC users

[larry C leung]

Older hi-perf engines were designed when manufacturing en mass the
excessively tight clearances necessary for enough journal bearing support
at high speeds was difficult, so they used larger clearances
necessitating higher viscosity oil. As manufacturing capability improved,
thinner (less drag, better fuel economy and emissions) oil became
feasible.

LL - NY

On Wed, 14 Nov 2001 17:42:29 -0500 "TM" <t44tq at mindspring.com> writes:
>True about the oil-
>My car ticks incessantly on even 10W30 Mobil 1, but is
>quiet w/ 15W50.
>
>What do you all think- are the older cars designed for a
>higher viscosity oil? I know that both 10W30 and 15W50 are
>not out of spec for my car according to the manual and the
>Bentley, but I hesitate to use something like the new formulation
>Mobil 1 0W40, which is the recommended oil for the 1.8T and 2.7T
>engines.
>
>Taka
>