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Engine Whine Since Oil Change to Synthetic

paulious May 19, 2009

  1. paulious

    paulious Member

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    Hi,
    I recently did an oil, filter and air filter change, replacing the 10w40 castrol gtx magnatec oil for Mobil 1 0w40 fully synthetic. Ever since the engine makes a distinct whining noise, the pitch is related to road speed and not engine revs as the noise remains when the clutch is pressed down. It sounds very much like a turbo spinning up however i doubt very much that the turbo pixies fitted one over night for me :p

    Has anyone else had this whinning noise after changing to a thinner oil?

    car is a audi a3 1999
    1.6sport
    190,000 miles
    touch wood i have never had any problems with the engine whatsoever

    The only possible thing that could be related is that my starter motor is on the way out and makes a loud shreak whenever you start it but that lasts about a second.

    Thanks
    Paul
     
  2. Nilz

    Nilz Defo worth the wait :) Team Ibis TFSI Owners Group quattro Audi A4 S-line owners group saloon Manual

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    Dude, i really dont think you should be using fully Synthetic on a 1.6 sport, they normally do that for Higher performance cars eg S3, S4 etc....

    Think you would be better sticking to 10w40.

    Have a look on the Castrol website, if you put your number plate in, it will tell you exactly what you need.

    Hope that helps.
    Nilz
     
  3. Shy19s

    Shy19s Oil running through my veins.

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    defo agree with nilzy.. 0w40 synthetic on a 190,000 mile car is nononononono...
     
  4. paulious

    paulious Member

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    Hey guys,
    thanks for your comments, i have checked with the Castrol website and it recommends

    Edge 5W-30

    i do believe this is another synthetic oil, and my very limited knowledge about cars suggested that a fullysynthetic oil of a thinner grade would help to reduce friction and increase heat transfer. Having said that ofcourse i now have that whining noise!

    Do you think it would do any damage if i left this 0w40 oil in until the next service interval? Obviously with the mileage that the engine has done i want to look after it the best i can so bought the most expensive oil i could find :p
     
  5. Shy19s

    Shy19s Oil running through my veins.

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    i think its too thin for your engine, might not reach all the parts inside the block, could eventually end up rubbing metal on metal.. might be doing that now slightly.. could be the noise your hearing.
     
  6. paulious

    paulious Member

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    hmm, guess i better get the oil drain bucket out :(
     
  7. MintyS3

    MintyS3 Works 60% the time, Everytime.

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    If its speed related and not rev related its more likely to be a drivetrain issue I would of thought.
     
  8. Can i ask how much oil was used to fill your a3?

    Im about to do a oil change, but have no idea how many litres i will need!
     
  9. paulious

    paulious Member

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    hey, thank you for the drivetrain suggestion i thought so also as the clutch is depressed and the noise remains, i recently had the wheel bearings done and that usually makes a very different noise, i tried to record it on phone but it's too quiet. as for how much oil mate, i bought 4 litres which is says in the manual but that didn't take it past the bottom of the dipstick so i recommend 5 litre tubs, especially as occasionally you will need to top it up
     
  10. MintyS3

    MintyS3 Works 60% the time, Everytime.

    1,580
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    Perhaps check the gearbox oil? Yeh bearing usually isnt a whine.
     
  11. paulious

    paulious Member

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    i thought about transmission, the sync mesh is on the way out too, it's a bugger to check the levels isn't it something to do with the little filler window. I will have a go sometime this week when i have time off and keep you all updated, thanks
     
  12. fingermouse

    fingermouse thats me

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    Our oil rep said you should never put Mobil 1 ubless its run on it most of its life, it can displace carbon in the engine and cause problems. But that was a rep talking
     
  13. S3 HODGE

    S3 HODGE Brown passenger seat.

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    My S3 took 4.5 Litres exactly (Sat at the top of the dipstick). Not sure on weather the A3's are the same as the S3's?
     
  14. Nilz

    Nilz Defo worth the wait :) Team Ibis TFSI Owners Group quattro Audi A4 S-line owners group saloon Manual

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    I believe its 4.5litres too..
     
  15. paulious

    paulious Member

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    yeah you are quite right, haynes manual says 4.5 litres for 1.6 and 1.8 audi a3 1996 - 2003
     
  16. Ok thanks guys!

    I guess thats why most of the top branded oil is sold in 4L, so you have to buy that extra 1-2L bottles...what a rip off..
     

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