"Clive Summerfield" wrote in message
.uk...
IMM wrote:
":::Jerry::::" wrote in message
...

Bollox ! Other than on engines
that have been designed to use such oil as a
requirement.

No engine is designed to use fully synthetic oils (although some
viscosities can only be met by synthetics).


I'm sure my vRS would love to hear that. Would save money on buying the
specific VAG product. And the same goes for SWMBO's 2.0PD Touran. Both
come
with copious warnings regarding which oils are suitable.

The waning will probably only apply to the viscosity, although some high
performance engines, usually withy turbos, synthetic can only do. Minerals
oils can hack it, but not for very long.

The average car is designed to run at a viscosity, because the odd moron
would put cheap crap Halfords stuff in. So, the engine has to be capable of
running well with cheap crap in it. Put proper fully synthetics in and the
engine runs brilliantly with smoothness prolonged. With specialist high
performance cars, the maker can say use this type and make of oil and the
owner will probably understand that and do it. People who buy those cars
know that the car is not a normal run of the mill motor.