Dua-dua also can.

To my knowledge:

W = oil viscosity under cold temperatures (winter level)
30/40 = oil viscosity under normal/hot working temperature

That's just my simple understanding though. You can google for more information.

Campro highly recommended xW40 for maximum protection for engine.

If you really want to know what is the difference in 5W40 and 10W40, its the cold rating. 5W can be used in sub zero temperature without lube thickening badly in cold.

For our weather it really does not matter. 5W is usually only available with fully synthetic or possibly semi lube due to its enhanced synthetic content. Mineral lube usually 10W along with most semi.

the rating 30 is thinner than 40. 40 is thicker thus is more suitable for higher temp driving such as high speed highway run. Most new foreign cars (that includes Honda, Toyota, etc) usually goes for 30 as its engine tech are cool enough especially for City drive, more save fuel. Cars like minis usually recommend 40 due to its powerful engine that are more suitable for high speed drive. Don't know why campro engine goes for 40 instead of usual 30 (Preve goes for 30 by default), maybe due to conservative thinking and probably not sufficient cooling tech or maybe ini engine more suitable for mid-high rev speed running.

ishh..... i really love persona's car design especially the front and the butt..... but the thing i really disappointing is the engine performance.... really slow respond....especially up hill =.=
Mine is manual by the way.... Gear one, GOOD , gear two....slow  ............( even i pijak sampai habis  ) , but cornering really stable    compare to my old sedan iswara.

well...i understand car body size and weight is one of the reason...  no choice but have to accept it as low price

how safe is Persona's body ?