ok la.. this is what the correct one..
QUOTE(Thrust @ May 19 2011, 07:20 PM)
Not suitable for small cc engines like Kelisa, viva & kancil... Those small cc engines needs xW-30 engine oil. This is because their small engine don't really generate much power & using thicker oil like 40 & 50 will make the engine even sluggish.
40 & 50 can be used for normal engine like Wira, Waja & usually 1.3liter engine and above.
Actually it depends on individual,
the thicker the oil, the more protection it gives to your engine. That is why Castrol has SAE60 grade oil for maximum protection.
QUOTE(Thrust @ May 19 2011, 07:26 PM)
Of course it can be used on Viva...

the thicker oil are not protecting ur engine.. it just how to solve the problem.
valve seal problem, oil decreasing too much, tappet issues and etc..
low cc engine normally like viva used w30.. either 10w30 or 5w30.. BUT not 0w30
the low the xW number , the oil is very thin.. thats mean..
DO NOT USED 0w30 on VIVA... no one in malaysia used 0w30 on their viva..
high cc engine better used 40,50 or 60 - because the engine generate more heat during running.. the number mean the engine oil operating temperature.
0w,5w,10w,15w,20w is as what u explained above but it also tell the level of the oil it selves.
if u using 0w50,0w20 on the normal and low cc engine (except hybrid car), ur car will KO faster.. aircond also sometimes cold and not (because engine also drive the aircond), more leaks.. head leaks, white smoke, SLUGGISH and etc..
ok this example ;
20w50 - for old car.. > 10years which is have white smoke (valve seal ) problem
10w30 - for low cc engine (kenari/kelisa/viva) but this car also can used 5w30..
10w40 - recommended for car > 5 years but it also can be used on new car, also can be used on old car if the user maintain to used it.
5w30 - recommended for new car
5w40 - recommended for new car which prefer performance
0w20 - hybrid car
0w50 - high performance car, new engine,good maintenance...
This post has been edited by gagak_84: May 19 2011, 07:56 PM