Need to do an oil change on the kids PW50.

Manual says to use 10w30 but I have aloud of 10w40 kicking about from my track bike.

That'll do won't it?

yes it will its just thicker oil

Small engine...so thinner oil is better...heats up quicker...offers less resistance to moving parts.

10w40 will be fine in the summer, come to think of it, I think it will be fine full stop on a 2T as it is only used in the gearbox. Heavier oil means it will protect the transmission a bit better in hotter weather.

Quote from: Carbon_ZX6R on June 29, 2014, 03:58:41 PM
yes it will its just thicker oil

not quite, multi grade oils change viscosity as the temp varies so a 10w30 has the viscosity of a 10w oil when cold and a 30w oil at thep. So using the 10W40 is probably OK but once the engine is at temp the oil is effectively thicker (40w), it's a small engine so will have small/narrow oil passages so may not be a good idea to use it.

Manufacturers recommend certain grades for a reason.

Quote from: ash on June 29, 2014, 08:22:36 PM
10w40 will be fine in the summer, come to think of it, I think it will be fine full stop on a 2T as it is only used in the gearbox. Heavier oil means it will protect the transmission a bit better in hotter weather.

PW50 is a four stroke I believe

Quote from: Carbon_ZX6R on June 29, 2014, 08:25:56 PM

my bad then, points about multigrade oils stand though ;-)

Quote from: Green_Ninja on June 29, 2014, 08:24:05 PM

Quote from: Carbon_ZX6R on June 29, 2014, 03:58:41 PM
yes it will its just thicker oil

not quite, multi grade oils change viscosity as the temp varies so a 10w30 has the viscosity of a 10w oil when cold and a 30w oil at thep. So using the 10W40 is probably OK but once the engine is at temp the oil is effectively thicker (40w), it's a small engine so will have small/narrow oil passages so may not be a good idea to use it.

Manufacturers recommend certain grades for a reason.

As I eluded to...thicker so smaller engine can do without the additional resistance how ever little we perceive that to be.

long answer short it wont kill the bike

Quote from: Carbon_ZX6R on June 29, 2014, 08:48:51 PM
long answer short it wont kill the bike

That wasn't the question though.

question was will it do and the answer is yes

ive used it in a 50cc before and I never noticed a difference

Quote from: Carbon_ZX6R on June 29, 2014, 08:59:20 PM
question was will it do and the answer is yes

ive used it in a 50cc before and I never noticed a difference

The answers no...use the specified grade. :-)

but but but its just sitting there and you can clearly tell he wants to save him self the pennys....... ok ill shush...

Quote from: Alzo on June 29, 2014, 09:10:40 PM

Quote from: Carbon_ZX6R on June 29, 2014, 08:59:20 PM
question was will it do and the answer is yes

ive used it in a 50cc before and I never noticed a difference

The answers no...use the specified grade. :-)

+1