20-09-2015, 02:52 PM
(20-09-2015, 07:41 AM)Jonny81191 Wrote:(20-09-2015, 07:00 AM)pro_steve Wrote: I had the same at Euro this week, normally they recommend 10W40 but now they've changed it.
I've experimented around with it and I've tried 5W30 in the 2.0s, but I've decided I prefer to use 10W40 now.
Interesting, what made you go for the 10w40?
Well, it might just be in my head but I'm sure it's a little quieter with the 10W40 over the 5W30, and when running lots of boost thicker oil must help prevent the lifters from collapsing at the higher revs, I might try a back to back comparison and see if it actually makes a difference.
I only tried the 5W30 because in one of the Peugeot manuals it said you get better MPG and performance due to the reduced viscosity, but I haven't noticed much of a difference if any.
I did just read that if you have the wrong viscosity then it can drain out of the hydraulic tappets when the engines off, so using 10W over 5W could make sense to make it start up quieter?