It is always
better to use what is the recommended engine oil for Kawasaki KLX150s which is
a liter of 10W-40 fully synthetic. And it is better for you to change the oil
regularly if you know that you are going off roads most of the weeks in a
month. A friend of mine which is a mechanic told me that if we are going for a
long distance ride on road, we should be using thicker engine oil for example
20W-40 synthetic so that when the engine got hotter than the way it shouldn’t
be, thicker oil won’t get dried very quick which can damage your engine
especially the piston and the engine block. I saw it happened in front of my
very eyes how dry engine oil cause terrible damage to KLX150s engine during me
and my friends 5000 kilometres go and return expedition from Kuching, Sarawak
to Kudat in Sabah.
One more thing,
make sure that you are using the original oil filter made especially for
Kawasaki KLX150s and not other filter that looks the same from the outside but
totally different from the inside which is meant for other motorcycles. If you
fail to use the right filter, the engine oil might not fully reach through and
lubricate some of the crucial components in the engine itself for example the
piston related parts which can cause bad damages to the piston for example
scratches that will reduce the performance of your machine and at the end will
cause you a lot of money for repairing.