I've got a 2008 focus st 225, it might just be my ears playing tricks but when I boot it the turbo seems to make more noise.

I had it serviced about 4000 miles and 0/30 oil was used. When I had a chat with tim (that sorts out the cracked lines) he said to use 10/40 so I didn't know if that could be part of it?

Cheers for the help in advance

 

No, that is the same viscosity as the correct oil which I imagine is 5W/30.

It will be thinner when cold, however.

What do you mean by more noise, as in a bad noise?

Martin

 

When it spins up it's louder, or seems that way

 

Come on someone must have an idea, please!!!!

 

Does it still boost like it used to or does it feel sluggish? Could be a boost leak.

 

Still seems to boost the same? It's just louder or seems that way

 

I would have a check over of the boost hoses etc, it's not uncommon for the intercooler hoses to blow off so one could be leaking a bit. Mine when it was standard used to make a bit more noise some days than others, unless it is starts getting smokey or whining then I wouldn't worry a huge amount.

 

Cheers il have a check, thanks for that! I get paranoid with this car,

 

As said if you have a boost leak the turbo will be working harder to achieve the same boost, which will shorten the life of it!

Check the hoses etc as said, or get a pressure test done!

Martin