QUOTE(Cavino @ Jul 10 2012, 11:50 AM)
Actually there is no difference with 10W and 5W for our weather. THAT is WINTER weather rating. Its the number behind the W that matters, ie 5W30, 10W30, 5W40, etc. Essentially both 5W30 and 10W30 performed the same in our weather, both 10 and 5 are sub-zero temperature, so unless Malaysia start snowing, don't be bother with it.
30 and 40 perform differently with 40 being thicker and more suitable if you constantly speed on highway. 30 being lighter suffice for daily drive and it's actually much more economical in FC than 40 besides giving better torque. However speeding means heat in engine and if you constantly runs for long on highway at high speed, 40 will be more suitable albeit with sacrifice of FC and a bit of low end pickup.
Once engine got older and bore gap becomes larger (ie 100-200K mileage), your initially thickness might not suffice. One of the reason the older engine using 40 or 50 weighted lube.
Persona recommended lube is 40, probably becoz of its hot engine. The better cooling system of CPS probably allow Proton to suggest 30, FC saving and balance ride. FS do makes a slight difference as it can take absorb more heat before breaking up but frankly, unless we're racing constantly , the higher heat rating of FS makes no diffence for daily drivers.
Good info...thanks for the clarification...layman understanding about engine oil...haih....
What would be the cause of overcranking?
Added on July 10, 2012, 12:10 pmQUOTE(chickyyuan @ Jul 10 2012, 11:40 AM)
Hi bro gigabit, somehow my preve does not have OWV problem despite i only use the car on weekends only (take LRT to work...) (means 120 hours of inactivity...lol) whenever i start my car on weekends - it sounds normal to me...no overcranking sound.... strange....

How do you start your car? Insert key fob, press start button, press brake, press start again?
This post has been edited by Gigabit: Jul 10 2012, 12:10 PM