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  1. #1
    ShaunS3's Avatar
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    Engine Flush - Conspiracy Resolution

    Having read many engine flush threads following a quick search on the topic, it appears that there are many mixed views on this and I want this thread to provide a definitive answer for those considering engine flushes.

    There are many engine flush products available off the shelf from many motor factors and some are also stocked by main dealers, such as Forté and Wynn's.

    1. Forté Advanced Formula Motor Flush:

    Forte Motor Flush Advanced Formula Motor Flush - YouTube

    2. Wynn's Engine Flush:

    Wynn's Engine Flush - YouTube

    Some members have also reported that using Diesel fuel 50:50 with current engine oil would also have the same cleansing effect, if not better than an engine flush product.

    My S3 has now covered over 120k and my current view on flushing the engine is leaning towards a yes, although many members on here have categorically advised against using engine flushing agents as they can cause unwanted damage due to the broken down deposits during this process clogging up oil lines etc resulting in the engine being starved of oil.

    I do agree to some extent that the broken down deposits following this process may cause blockages, but surely if you are totally removing the sump, deep cleaning anything that's left in there and replacing the oil pick up/strainer, then the likelihood of this happening would be very slim to none?

    Ideally, I would like technically minded/high skilled mechanics to respond to this thread but anyone's previous experiences with engine flush are also welcomed.

    Shaun.

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  3. #2
    James TQ's Avatar
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    i spoke to the dealers about this and they said they used to do it on every service untill all the cars came in again a month later with the oil light on, they said if you do a flush change the oil 3-4 weeks later

  4. #3
    Dani_B19's Avatar
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    Been using eiher forte or stp flush in mine for last 4 years and no problem at all.
    Driving the most secretive S3 on ASN

  5. #4
    olethalb's Avatar
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    apparently ATF has same detergents too

    i wouldn't flush an old 1.8T without cleaning the sump, some of those deposits are like small black stones (depending on how old / thrashed / well maintained) for reasons mentioned above.

    ideally if i was 'set' on doing a flush i'd drop the sump, clean it out and strainer flush it, drop oil repeat then drop the sump again and renew the oil pick up in cuse further deposits had been dislodged during the flush. from then on in you can make sure good oil and regular changes can be performed and maybe flush every other change but by 'normal' method of adding to oil and simply changing out with the oil change.

  6. #5
    ShaunS3's Avatar
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    Quote Originally Posted by Dani_B19 View Post
    Been using eiher forte or stp flush in mine for last 4 years and no problem at all.
    Had you seen any gain in running of the engine or performance at all? Does it seem to run more efficiently or smoother?

  7. #6
    ShaunS3's Avatar
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    Quote Originally Posted by olethalb View Post
    apparently ATF has same detergents too

    i wouldn't flush an old 1.8T without cleaning the sump, some of those deposits are like small black stones (depending on how old / thrashed / well maintained) for reasons mentioned above.

    ideally if i was 'set' on doing a flush i'd drop the sump, clean it out and strainer flush it, drop oil repeat then drop the sump again and renew the oil pick up in cuse further deposits had been dislodged during the flush. from then on in you can make sure good oil and regular changes can be performed and maybe flush every other change but by 'normal' method of adding to oil and simply changing out with the oil change.
    I have read that flushing an engine of high mileage, i.e. over 75,000 miles is a bad idea, possibly like you say due to the deposits being like small black stones.

  8. #7
    Dani_B19's Avatar
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    I would say any benefit you may feel would be false economy and more down to the fact that youve just done a service. End of the day ill keep doing it, if anything was to happen, it would have happened by now, 4 years down the line if any problem was to occur it would have, btw my cars on 120k and ive been flushing since 90k.
    Driving the most secretive S3 on ASN

  9. #8
    superkarl's Avatar
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    i did it once because i had a blocked pick up pipe and loss of oil pressure.
    i actually did it twice with 2 oil changes in one day.
    that was 3 years ago.
    after a flush as long as you do oil changes AT LEAST every 10k the engine remains clean as whistle. no need to flush if you keep on top of servicing.
    Audi dealer techs prob did it because of longlife servicing, as such was probably worth it because longlife servicing is stupid.

  10. #9
    Dani_B19's Avatar
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    End of the day aslong as you change the oil every 5-10k then i cant see how any deposits will really form as the oil should still be in a complete state and not begun tp break down yet.
    Driving the most secretive S3 on ASN

  11. #10
    ShaunS3's Avatar
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    Ok, so what's the best product on the market then?

    Forté / Wynn's / Millers Flush / Liqui Moly / Amsoil or good old fashioned Diesel?

  12. #11
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    I like forte but it can be dear and hard to find.
    Driving the most secretive S3 on ASN

  13. #12
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    I flushed my old 105,000 mile Audi A4 1.8T using the Wynn's product, and less than a mile after refilling with fresh oil and filter, the pick up pipe had blocked.

    So, I would say only flush if your next job is to remove the sump and clean the pickup.

    My own regime for my current car is 'if it isn't broken, don't fix it' and instead do an oil change every 5-6k instead. The more gradual detergent effect of regular oil changes is my preferred approach.
    Audi S3 - 2002MY - Denim Blue

  14. #13
    superkarl's Avatar
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    Quote Originally Posted by Tooks View Post
    I flushed my old 105,000 mile Audi A4 1.8T using the Wynn's product, and less than a mile after refilling with fresh oil and filter, the pick up pipe had blocked.

    So, I would say only flush if your next job is to remove the sump and clean the pickup.

    My own regime for my current car is 'if it isn't broken, don't fix it' and instead do an oil change every 5-6k instead. The more gradual detergent effect of regular oil changes is my preferred approach.
    ^good point right here ^

    i only did mine because of an issue

  15. #14
    ShaunS3's Avatar
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    Quote Originally Posted by Tooks View Post
    I flushed my old 105,000 mile Audi A4 1.8T using the Wynn's product, and less than a mile after refilling with fresh oil and filter, the pick up pipe had blocked.

    So, I would say only flush if your next job is to remove the sump and clean the pickup.

    My own regime for my current car is 'if it isn't broken, don't fix it' and instead do an oil change every 5-6k instead. The more gradual detergent effect of regular oil changes is my preferred approach.
    I plan to flush the engine, remove & clean the sump pan completely, replace the oil pick up pipe and also the oil pump as part of a major service.

  16. #15
    phil miller's Avatar
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    Ok my input, so a little back ground on ME

    1993, i left school ( yes i know i dont look 36 ) and started in my first garage, EVERY service had a Forte engine flush, now we use to look after a lot of 205 Diesels, now on a diesel when you start it after an oil change the dip stick will always show the oil being BLACK, yet after 2/3 services and using the flush, after the oil change the dip stick showed clean oil, also it helped lower exhaust gases, IMHO Forte motor flush is a great product

    Now 2013 if i bought an 1.8T i wouldnt put a flush (of any sort) near it until after the sump and pick up had been removed and cleaned/replaced, Ron has a new pick up and from now on he will have a forte flush ran thro at every oil change

    Forte can be hard to get hold of, so IF ANYONE WANTS IT PM ME AND I WILL SEND YOU A BOTTLE

    the local forte rep is a close friend so will sell it to me even tho im not a garage
    ​Wish Rachel would let me have my TDI mk5 back


  17. #16
    Dani_B19's Avatar
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    What for free, you sir are a legend, ill take 4 crates please haha.
    Driving the most secretive S3 on ASN

  18. #17
    phil miller's Avatar
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    Quote Originally Posted by Dani_B19 View Post
    What for free, you sir are a legend, ill take 4 crates please haha.
    Lmfao, ok to put in context, at work my boss pays £8 a can with a RRP of £13.95 i can supply a can inc postage for £7.50
    ​Wish Rachel would let me have my TDI mk5 back


  19. #18
    Dani_B19's Avatar
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    Thats a good price indeed, may have to be in touch shortly .
    Driving the most secretive S3 on ASN

  20. #19
    Cobra88's Avatar
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    1993, i left school ( yes i know i dont look 36 )
    Hey i left school in 1979 and i don't look 36 either !
    2001 Audi A3 (8L) 1.9Tdi SE 110 3d in Mineral Grey.
    18" TD 1.2s & Toyos, S3 Seats with Kufatec looms, JOM Coilovers, .240 Nozzles (HFLO-X),PD150 Turbo (GT1749VB) Malone tuning map,Pipercross Air Filter,PD150 inlet manifold,PD150 TiP,PD150 Maf, Darkside EGR Delete,Darkside Alloy Intercooler & Pipe kit,Darkside Turbo Oil feed pipe,11mm Pump, PD lift pump. Currently 188hp and 320lbft, Southbend SMF st2, milltek full system with golf 4mo tailpipes,S3bumpers,Liquid Gauge,VCDS Lite Registered

  21. #20
    phil miller's Avatar
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    Quote Originally Posted by Cobra88 View Post
    Hey i left school in 1979 and i don't look 36 either !
    LMFAO
    Good reply dude
    ​Wish Rachel would let me have my TDI mk5 back


  22. #21
    ShaunS3's Avatar
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    Quote Originally Posted by phil miller View Post
    Lmfao, ok to put in context, at work my boss pays £8 a can with a RRP of £13.95 i can supply a can inc postage for £7.50
    I presume there is only one Forté engine flush which is their advanced formula motor flush?

    I've also pm'd you Phil

    Shaun.

  23. #22
    phil miller's Avatar
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    Quote Originally Posted by ShaunS3 View Post
    I presume there is only one Forté engine flush which is their advanced formula motor flush?

    I've also pm'd you Phil

    Shaun.
    Yeah just the one Shaun

    Ive replied to your PM aswell mate
    ​Wish Rachel would let me have my TDI mk5 back


  24. #23
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    I left school in the sixties and don't look my age. I look more like 100.

  25. #24
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    On the oil front, apparently, all oil starts to break down at 6k and six months no matter what the price. We change road cars at 6kish and track car 2kish and mini 1to 2k. It has been proved that regular changes will clean the engine.

  26. #25
    phil miller's Avatar
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    Quote Originally Posted by bigal 1 View Post
    I left school in the sixties and don't look my age. I look more like 100.

    If the truth be know Al when i met you i thought you were in your mid 50s tbh, and put another way, my old man (67) wouldnt get in ron let alone drive the ring in under 9 mins
    ​Wish Rachel would let me have my TDI mk5 back


  27. #26
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    You are too kind. Are you looking for another free lunch.???

  28. #27
    phil miller's Avatar
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    Quote Originally Posted by bigal 1 View Post
    You are too kind. Are you looking for another free lunch.???
    you know me, i would never say no to lunch
    ​Wish Rachel would let me have my TDI mk5 back


  29. #28
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    Surely the best method would be to do a full oil change and sump drop. Use that cheap oil ECP always have on offer. Another change of oil then drop the sump again. New quantum platinum.

    On my mk2 golf with a mk3 16v 2.0 ABF lump I used ATF in the oil.
    Really did the trick. But would never risk it with a turbo lump.

    costco do 25l drums of cheap oil I may use as a flush. Make sure it's all good to go then from then on strictly synta.
    Probs get one of those suckers to drain from the dip stick tube.
    Last edited by paultownsend; 24th March 2013 at 15:01.

  30. #29
    IGI
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    Having been in the motor trade as a mechanic for nearly 20yrs ...im not a fan of engine flushes
    Most garages ive worked at in the past used oil flushes and will sell it to you as a good thing for your engine but at the end of the day its all about making some extra cash really.
    The garage i freelance for at moment they use a oil flush and a fuel additive at every service they do ...how much extra is that a week they make on servicing!

    On the 1.8t id defo drop the sump and check/clean the pickup if its never been done.... then if you want to get cleaner engine oil just change the oil more frequently ... i change the oil on the S3 every 5k

 

 

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