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Diesel treatments

Discussion in 'Motors' started by Kennysevenfold, 15 Jun 2017.

  1. Kennysevenfold

    Sgarrista

    Joined: 9 Sep 2008

    Posts: 7,945

    Location: Glasgow

    Do they work?
    Just a placebo effect?

    Anyone tried one and found it benificial? Specifically Forte advanced diesel treatment?

    Got one free today and wondering if i should use it?

    Cheers
     
  2. Scuzi

    Man of Honour

    Joined: 18 Oct 2002

    Posts: 19,833

    Location: Екатеринбург

    I haven't used one so can't answer your question but I have one of my own. What would you be hoping the treatment would achieve? Are you having problems?
     
  3. Kennysevenfold

    Sgarrista

    Joined: 9 Sep 2008

    Posts: 7,945

    Location: Glasgow

    No problems just now, the rep said it would keep injectors/fuel pump etc clean and i dont have to have any problems before i use it, i dont know.....
     
  4. Semple

    Sgarrista

    Joined: 5 Mar 2010

    Posts: 8,025

    I've been pondering buying some diesel additives. As i only ever buy supermarket diesel, i hear there's little additives to help clean the engine.

    I wasn't planning on over-using it, was more of a once a month/2 months.
     
  5. robj20

    Capodecina

    Joined: 9 Apr 2007

    Posts: 10,046

    I use Archoil in mine 50ml per tank. Improves my mpg enough to pay for its self. Time will tell if it keeps things clean, I do notice it doesn't seem to regen as often so it must be doing something.
     
  6. Rilot

    Don

    Joined: 18 Oct 2002

    Posts: 20,632

    Location: Wargrave, UK

    You see, what I don't understand with these is that if they actually worked in a measurable sense, wouldn't the petrol companies put it in the fuel to begin with? Wouldn't the car manufacturers recommend the use of them?
     
  7. robj20

    Capodecina

    Joined: 9 Apr 2007

    Posts: 10,046

    They do don't they, what's in V-power.
     
  8. Kennysevenfold

    Sgarrista

    Joined: 9 Sep 2008

    Posts: 7,945

    Location: Glasgow

    I do belive some manufacturers recommend 'forte' if in for a service, dont know if thats just to sell it though..
     
  9. Dangerous Dave

    Mobster

    Joined: 10 Oct 2006

    Posts: 3,362

    They do in Shell Vpower diesel & BP Ultimate diesel. It almost doubled the distance our old Zafira would do between DPF regens
     
  10. robj20

    Capodecina

    Joined: 9 Apr 2007

    Posts: 10,046

    Mazda use one called seafoam.
     
  11. Rilot

    Don

    Joined: 18 Oct 2002

    Posts: 20,632

    Location: Wargrave, UK

    Right, so why not buy quality fuels if they have the stuff you want in them already?
     
  12. robj20

    Capodecina

    Joined: 9 Apr 2007

    Posts: 10,046

    Morrisons don't sell V-power. I'm not driving out of my way for it either, Archoil costs around £1 per tank so it's also cheaper.
     
  13. Dis86

    Suspended

    Joined: 23 Dec 2011

    Posts: 26,261

    Location: Northern England

    Premium fuels do contain them to begin with.
     
  14. robj20

    Capodecina

    Joined: 9 Apr 2007

    Posts: 10,046

  15. Semple

    Sgarrista

    Joined: 5 Mar 2010

    Posts: 8,025

    As Rob mentions, premium fuels are not as widely sold.

    I'm not looking for mpg gains, i'm hoping the use of additional additives will help clean out the engine a bit more, and thus should prevent problems further down the road.
     
  16. robj20

    Capodecina

    Joined: 9 Apr 2007

    Posts: 10,046

    There is so little proof of they even work, but my car seems happy, increased mpg and less dpf regens to me seems it is working so I'm going to continue using it.
     
  17. minimadmotorman

    Hitman

    Joined: 11 Dec 2009

    Posts: 530

    Location: Barnsley

    I occasionally chuck about 400ml of 2 stroke oil in my old PD130 A6 when I tank it up.
    After about 100 miles it becomes noticeably quieter and picks up about 3-4mpg over the tank.
    Bum-Dyno says it feels a bit more responsive too but I expect thats just the placebo effect.

    I only put it in when I have some leftover from work. Usually buy a 500ml bottle of the cheapest green mineral stuff use about 100ml to mix up some 2 stroke for some kit then dump the rest in the car.

    I keep meaning to buy a couple of litres and dose it over 5 tanks and see if there are any long term benefits but I've not been doing the miles nor do I have the motivation.

    I do however recall the first MOT I had with it the emissions whilst a pass were close to the limits.
    The 2nd MOT happened to be when it had some 2-stroke in as I was concerned it would fail, to my surprise it was about a third of the previous years test!
    Same garage, same tester, same gear and had been serviced both times prior to MOT by myself.

    With the above in mind I gave it the 2-stroke treatment prior to it's most recent MOT and the emissions were similar to the previous (different garage this time).

    Read into it what you will, I'd not hesitate to put it in my A6 all the time if I could be bothered as it does seem to make a difference (at least on the trusty old PD130), however YMMV and I take no responsibility should your car self destruct the DPF clogs or you put too much red coloured 2-stroke in and get a tug from the Gestapo.
     
  18. Liquidfox

    Mobster

    Joined: 26 Sep 2007

    Posts: 4,119

    Location: Newcastle

    I'm lucky, my local Costco has just opened a petrol station so now I get Super-diesel for 108.9ppl :D
     
  19. Nasher

    Capodecina

    Joined: 22 Nov 2006

    Posts: 19,605

    I think how well they work depends on the engine. In direct injection engines you get buildup on the back of the injectors themselves and you probably won't be able to wash all that away with fuel additives. It can be really bad in some diesels and symptoms usually start with miss-firing, running rough or poor efficiency.

    In some recent petrol engines they have gone back to using port injection alongside direct injection to stop it happening (I know Subaru have with their boxer engines). That means the fuel can wash the back of the valves. Not sure about diesels though.
     
    Last edited: 16 Jun 2017
  20. Frozennova

    Man of Honour

    Joined: 13 Nov 2009

    Posts: 11,412

    Location: Northampton

    It's not the backs of the Injectors that's a problem, its carbon build up on the backs of the valves that causes reduced power and economy