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  1. #1
    TURBOTRONICS's Avatar
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    will it do any damage

    if i put 15w40 in my s4 for a week or so will it do any damage

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  3. #2
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    I used 15w-40 on the advise that it would stop chain rattle as its thicker... yeah it worked for a while, but using the incorrect oil can lead to all manner of issues long term - why just a week out of interest?
    B6 S4 4.2 V8 SILVER SALOON - BEIGE ALCANTARA - BOSE SYMPHONY - DRILLED/GROOVED FRONT DISCS

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  4. #3
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    Best oil for V8

    may find this interesting...
    B6 S4 4.2 V8 SILVER SALOON - BEIGE ALCANTARA - BOSE SYMPHONY - DRILLED/GROOVED FRONT DISCS

    FOR SALE: £6750ono

    Previous Cars
    .:R32 MKIV 3DR Pearl Black (Awesome car), Lexus RX300, Lexus LS400, Mitsubishi Shogun Sport V6, Audi TT Roadster 225, Range Rover Vogue 4.6 V8, Mazda RX8 231, Peugeot 307 CC 180, Subaru Impreza WRX 2.5, BMW520i, Lexus IS200,Golf GTi MKV, Audi A4 1.9TDi 130

  5. #4
    TURBOTRONICS's Avatar
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    i bought some oil intended to do an oil change on my s4 but as it has the dreded rattle i thought it would benefit from a thinker oil but my mate that has is own garage said this was bull **** and i could ownly put castrol edge in it and when it takes 10l to fill it i thought other wise but i have it now i wanted to put it in till i can afford better oil

  6. #5
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    Would certainly work as a cheap flush oil. I would say if it's only for a week and you're not planning on thrashing it. It'd flush the car out quite nicely.

    On another note 10litres in the v8?!
    Atlas Grey A4 2.5 TDI Quattro Sport.
    Mods so far: Cruise control, DIS, Heated Mirrors, Tuning box, Xenonx, Centre Arm Rest, MFSW, RNS-E, SDS and Aero Wipers.
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    Next: Auto dip rearview mirror and Folding Mirrors.

  7. #6
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    15w40 is a semi synthetic isn't it? I wouldn't use that personally as it needs fully synthetic and not that i know much about oil but i think that 15w would be too thick. Audi recommend 5w30, but 5w40 is what most people use to stop the chain rattle at start up. The v8's need a thin oil really.

    Put the 15w40 on ebay or in the classifieds! Better to sell it at a loss than wreck the engine
    Sam,




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  8. #7
    dsmclark40v's Avatar
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    Quote Originally Posted by BlackQuat View Post
    Would certainly work as a cheap flush oil. I would say if it's only for a week and you're not planning on thrashing it. It'd flush the car out quite nicely.

    On another note 10litres in the v8?!
    A litre a cylinder is the normal guideline for most cars. The s4's have a bit more, takes just over 9L
    Sam,




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  9. #8
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    Here's an example - we'll use 5w30. Which is actually "5 winter 30". At cold temperatures the oil won't thicken up more than straight-5 weight oil, and when hot, the oil won;t thin out more than straight-30 weight oil. 40 means its thicker at operating temp than a 30. if you use a 40 weight in an engine that calls for a 30. you can ruin your engine as the thicker oil cant get to all the places in the engine that it should. so use what the car calls for....

    B6 S4 4.2 V8 SILVER SALOON - BEIGE ALCANTARA - BOSE SYMPHONY - DRILLED/GROOVED FRONT DISCS

    FOR SALE: £6750ono

    Previous Cars
    .:R32 MKIV 3DR Pearl Black (Awesome car), Lexus RX300, Lexus LS400, Mitsubishi Shogun Sport V6, Audi TT Roadster 225, Range Rover Vogue 4.6 V8, Mazda RX8 231, Peugeot 307 CC 180, Subaru Impreza WRX 2.5, BMW520i, Lexus IS200,Golf GTi MKV, Audi A4 1.9TDi 130

  10. #9
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    Quote Originally Posted by dsmclark40v View Post
    A litre a cylinder is the normal guideline for most cars. The s4's have a bit more, takes just over 9L
    Might Have to do some reading. I was told 4.5 for my v6. Best check that! I need a v8
    Atlas Grey A4 2.5 TDI Quattro Sport.
    Mods so far: Cruise control, DIS, Heated Mirrors, Tuning box, Xenonx, Centre Arm Rest, MFSW, RNS-E, SDS and Aero Wipers.
    To do: None yet.
    Next: Auto dip rearview mirror and Folding Mirrors.

  11. #10
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    i would agree dont do it and as for the chain rattle although it seems bit of a characteristic of the engine mine used to do it a bit and then started running bad and after stripping it down we found 2 broken guides, its all done now and no longer rattles

  12. #11
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    Quote Originally Posted by jutlis 3.0 View Post
    i would agree dont do it and as for the chain rattle although it seems bit of a characteristic of the engine mine used to do it a bit and then started running bad and after stripping it down we found 2 broken guides, its all done now and no longer rattles
    Glad your car is sorted now jutlis. Must be great now with all the work you have had done to it.
    B6 S4 4.2L V8 Cabriolet Black Manual Quad Milltek Non Res

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    so far so good just very paranoid at the mo and keeping an ear out for any strange noises etc! altogether had new chains/guides/tensioners/clutch/flywheel/rocker gaskets/oil cooler/crank and temp sensors/2 injectors/8 coilpacks/spark plugs/fuel filter etc etc.......phew! some needed, some precautionary

 

 

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