Dave Plowman (News) wrote:
In article .com,
StealthUK wrote:
I've used it and noticed engine noise was reduced, especially
during
start-up, with no adverse effects.

A thicker oil will often help with noise during start up. But a
thicker
oil will also increase fuel consumption and possibly warm up wear.

On a cold start a thick oil may disguise some noise in a clapped out
engine but not when warm. IME the engines were smoother hot and cold
and there were no negatives regards performance. Also, the oil was no
thicker having added Slick50.
I've used in at least 5 cars - all ex-fleet 2/3 years old with 70k plus
on the clock.
The most important thing is that people use a decent quality oil and
check it regularly.