My bro has just done an oil change on his using Castrol RS which I beleive is a 0-40w oil. I told him this oil was too thin and he'd be far better off with Mobil1 Motorsport which is a 15-50w oil. He was adamant that this was the oil recomended to him for his car by the shop guy.

What's the crack? Who's right? What can be expected if I'm right and the oil is too thin?

 

Use Castrol 10/60 rather 0/40 IF you can find some

 

As above m8.

 

So I'm right then, the oil he was recomended is wrong?

 

was it halfords? they talk bollox. i saw that the other day

 

Yes diamonds it was Halfords

 

thought so. tossbags. i use magnatex 15w40

 

He's done the change now though so it's not like it can be returned either

What damage is he likely to suffer as a result?

 

depends how long he was using it for

 

Possibly low oil pressure, might sound tappy.

 

He done the chage yesterday but won't change it again as it cost him a fair few quid. Basically he will run with this oil until the next change or until somthing fails. HE doesn't take after me when it comes to doing things right the first time

 

i use 5/30 in mine no probs. its not too thin. depends on the condition of the engine tho!

 

5w/40 fully synthetic is the correct, manufacturer recommended oil for a standard engine.

Gareth