hey guys . . .
is it safe to use 10W-30 when our cars require 5W-30 ?
kinda weird and stupid question but hey i was just wondering . . .
and give info if yoo can . . .

 

10 wouldn't hurt I "guess." I've used 10 on my friend's Toyota Crown, which requires 5W-30. All it did was hinder acceleration a bit. I don't know how to explain this, but what I think is that 10 is just thicker. It protects more than 5, but will decrease performance.

 

i need better info please . . . anyone ?

 

I would stick with the 5w. You will lose a couple HP if you run the 10w.

The difference is the "thickness'' of the oil when warm. In example, if were to pour the 5w and 10w into a cup, fresh out of the bottle, they would basically flow at the same rate being "30w", but if you were to warm them up to "operating temp" and pour them the 5w would flow quicker than the 10w...

So, basically the 10w-30 creates more "drag" on the reciprocating assembly than the 5w which in turn makes you lose HP...

 

but it wouldn't do no harm to the engine right Jay ?

 

The weight has also to do with the outside temperature that the car is going to be operating in. Oil has temperature ranges. i am not sure of the exact specs.

-deepsi

 

in winter driving where it freeze s use the 5W-30...but if u live in an area where it seldom freeze s a 10W-30 will work for u

 

Yeah i knew it was something like that, but i was to lazy to find the answer

 

been running 10w30 on the b18c for some time now, no problems....

search the ITR forum for all your oil questions btw

 

lol...yea i already posted in the itr forum...not much help around here...thanx anyways...