First thing first Caltex Havoline 20W-50 is not for motorbikes. They haven't written any such thing on their pack as well .Also Caltex is providing this viscosity in car oils. So all of honda 125 users are being fooled by them k pata nai app ka engine kitna bara hai k jis waja se app ko humara wo oil use karna paray ga k jis pe hum yeh likhtay hein best for light engine vehicles aur yehi num car ol mein bhu daty hein ........
But 20W-40 is design for bikes and they are also claiming the same . Design for old style motorcycle engine.
Aur waisay bhi market mein most of the manufacturer yehi viscosicty level produce kar rahay hein including all honda .
Abb log kahein *** k wo tokhud Shell se oil laitay hein to mein kaho ga k atleast apni specs kay according oil to banwatya hein phir chay kisi say ho . What i believe k wo PSO se OIL lay rahay hein
So that is for sure k 20W-40 is the best as if we would be getting technical tau Honda multigrade oil suggest kar hai abb i mien diffeernce ziayda rakhana app ki marzi hai but then you need to be very concious with temp .in extreme summers thick can alos be used but in winters only thinner is good .
So its smart to have something that could meet all demands