Quote Originally Posted by speedyfix View Post
you should only the the 5w30 oil. if it is available naman then follow the recommended viscosity index given by the manufacturer. you will feel the sluggishness of the engine if you use a 40 weight oil plus lalakas ka sa gas.

the 5w30 oil will be able to take any kind of driving you throw at it. we've seen RP's 5w30 used on supercharged bmw's without any problems so it can take anything you throw at it.
sir speedy ask rin sana ko opinion from you, ok lang ba 10W40 sa GLi ko? thanks!