In article ,
Grimly Curmudgeon wrote:
I wouldn't say it's ********, but I would also say that to describe it
as 'complete folly' is simplistic, again it will depend on what the
engine has been designed to use.

Exactly. The use of synthetic in absolutely every engine, as was
advocated, would be a waste of money in many cases.

I've also read that engines not designed for it may leak - something to do
with the seals not being up to it?

--
*Never underestimate the power of very stupid people in large groups *

Dave Plowman London SW
To e-mail, change noise into sound.