May anyone give me some suggestion on synthetic motor oil? Mobil 1? Castrol GTX? or Pennzoil Platinum? , which one is better regarding turbo car? Althought Castrol is recommended by dealers, some one told me that both Castrol and Mobil are not full synthetic motor oil (100% PAO). Also is this true t...

Thanks for all your suggestions! My car has 102,000 kilometers and for about 1 month ago I has started to notice a whistle noise coming from fuel pump. I have read many threads which metion the similar noise was just gone after they used fuel system treatment/cleaner. So I wonder whether I can give ...

Thank you RaymanSean!
Because currently I do not have the tool to measure the fuel pressure, can I use Multimeter to test fuel pump amperages?
Another question is that I do not know the normal amp for volvo s60.

Thank you superjodz and FCPGroton so much!!!
The picture is so helpful !

Does some one has experience to use fuel system treatment/cleaner?
which brands are better?
Whether it is OK to use fuel system cleaner, like Lucas or Motul, on Turbo cars?
Thanks in advance!

Till now my car has run well and no apparent loss of performance.

A few days ago I have posted a thread about the high pitch noise at the rear end. Now I track down the whistle coming from the fuel pump. Usually the noise starts whenever I start the engine. So this time I started the engine, the noise just stopped as soon as I pulled out the fuel pump fuse (fuse 3...

May some one tell me where is the fuel pump relay located?
My car is 04 S60 T5 and the fuel pump fuse is 33.

Thank yuckuJackD so much for such detail PDF file and again thanks a lot for otis44 and FCPGroton for your helpful suggestion!!! I made a hook this time, removed the speaker grill and found the reason of the speaker noise. There was a small piece of paper (a label) on the top of the speaker which ca...

Thanks for all your tips!!!
A few days ago when I tried to use a flat plastic stick to unclench the mesh, it didn't work and formed a small dent on the soft part of the dash. So this time I will try the way you suggested.