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  1. #1
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    Quick Oil question 1999 S4

    The garage I get the car serviced in uses 5w30 castrol edge long life pro.

    All i can get locally is the is the normal 5w30 castrol edge.

    I'll assume its ok to top up with half a litre of the normal stuff :???



    Thanks,

    Bob

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  3. #2
    "Stick a V8 in it!"

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    topping up is fine.

    Get it off longlife and get it off 5w30 though.

    Change your oil regularly (mine gets done every 5k), and use 5w40. Audi do their own "Quantum Platinum" which is fairly cheap and good.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  4. #3
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    Fair enough and thanks.

    Gets changed every 5-7k. Didn't know about the audi stuff. Thanks for letting me know.

    haven't done any damage by using the 5w30?

  5. #4
    Iceash's Avatar
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    I'm running 10w40 car purs do changes every 4 to 5k

  6. #5
    "Stick a V8 in it!"

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    No damage, its just a bit on the thin side.


    Ice: 10w40 is semi-synthetic.

    I would recommend you stick to fully synth oil given the engines propensity to form sludge and the fact its turbocharged.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  7. #6
    Iceash's Avatar
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    Well yea I thought this, but audi said to use as its a high mileage engine. So went with what they suggested.

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    Quote Originally Posted by Iceash View Post
    Well yea I thought this, but audi said to use as its a high mileage engine. So went with what they suggested.

    Yeah, the garage that service mine used the 5w30 long life I assume for the same reason (160K miles on the clock)

    Anyway I for one will do as Aragorn suggests.

    Next change is due in the next 2-3 months, so will swap it out then,

  9. #8
    Iceash's Avatar
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    Quote Originally Posted by aragorn View Post
    No damage, its just a bit on the thin side.


    Ice: 10w40 is semi-synthetic.

    I would recommend you stick to fully synth oil given the engines propensity to form sludge and the fact its turbocharged.
    Right Audi is due another oil change, which oil should I go with? Car has done 143thou.

  10. #9
    Bradderz_1988's Avatar
    Dont replace it, Upgrade it !!

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    5w40 everytime !!
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

  11. #10
    Iceash's Avatar
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    Quote Originally Posted by Bradderz_1988 View Post
    5w40 everytime !!
    Cool.

    What benefits? Will I have to do anything special? To change that is?

  12. #11
    Bradderz_1988's Avatar
    Dont replace it, Upgrade it !!

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    You could do a 50/50 flush of diesel/oil to clean out the engine.

    Other than that maybe buy some cheap oil drain the 5w30's then fill with cheap oil run it to temp then flush and fill with 5w40's.
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

  13. #12
    "Stick a V8 in it!"

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    If the engines clean, i'd just change it.

    If the engines not clean and your wanting to clean it out a bit then you have a few options.

    Simplest is to buy 2 or 3 gallons of cheap oil (10w40 from asda or whatever) and do two or three oil changes back to back, with maybe 100miles of driving between them, ensuing the engine gets up to temperature properly etc. Then change to your good 5w40 oil. The thinking here is the clean hot oil will dissolve a lot of the crap into it, then gets flushed out and changed before it has a chance to start redepositing itself on the insides. A good indicator of this is how quickly the oil turns black. On a clean petrol, it'll take a good few thousand miles to go dark. On my engine, i change it at 5k and the oil looks black by then, but when wiped on some white tissue you can clearly see its dark brown rather than black.

    More agressive would be to use an oil flush, but i'm not sure i get the point of doing that on old used oil, ideally youd want to chagne it for cheap fresh oil, do the flush then change it again for good stuff.

    Most agressively is what bradderz suggests, a 50:50 mix of diesel and clean engine oil. You'd put this in, run the engine for 10mins at fast idle, then drain and refill with good oil.

    You can do some combination of all three if you like, diesel flush followed by a couple of rapid changes with clean cheap oil then switch to the good stuff or whatever.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  14. #13
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    One thing for sure, the 1.8t engines are hard on what oil they hold.

    Full synth @5w40 at a minimum I picked up 4l of edge fst at Asda for 38£ so wants too bad, it's an SN with some claimed improvements on the sludge front.
    Mind you if you change your oil 3-5k then you may not need the SN spec......
    I'll be going back to Fuchs[nee silkolene] ester 5w-40 next time round though.....just think it's a exceptionally good oil.

    cheers

    Mo.
    Last edited by mojocvh; 7th March 2014 at 15:26. Reason: slipped into 1.8tq mode there....

  15. #14
    Iceash's Avatar
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    Well she's running 5w40 now. I change every 4 to 5 though or 6 months. Which ever comes sooner really.

 

 

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