Best diesel system cleaner?

Best diesel system cleaner?

Author
Discussion

MichaelXJ

Original Poster:

605 posts

79 months

Thursday 25th November 2021
quotequote all
Hi all, wondering what people's experiences are with diesel cleaners? I am picking up a 2002 Mercedes s class with 220k miles on it. Yes I know its stupid but it's stupid cheap with 12 months MOT. One thing the owner said is it has the occasional misfire, now I thought the easiest thing to do would be to give the diesel system a clean as I suspect its been run on cheap fuel and it'll of started to sludge up somewhat and the spray pattern of the injectors won't be what they once were. He reports back decent MPG figures 40+ on a run so I think it's got some life left in it. Wondering what people recommend, I've seen wynns xtreme system cleaner, I've seen a mannol diesel ester fuel additive etc and wondering which would be best? A mixture of both or don't mix. Any advice would be appreciated! Thanks in advance.

MichaelXJ

Original Poster:

605 posts

79 months

Thursday 25th November 2021
quotequote all
Should probably say before people ask. Stupid cheap is £370.

brillomaster

703 posts

143 months

Friday 26th November 2021
quotequote all
wynns are a pretty established brand. but doubt that anything you would put in the tank would be detrimental, so, have at it. i bulk bought a load of rac diesel cleaners that i occasionally run through the engine - cant say i've noticed much difference...

it'll probably do you just as well to give it a decent run out and get the engine nice and hot, so it can burn off any nasties itself. when was the oil last changed?

MichaelXJ

Original Poster:

605 posts

79 months

Friday 26th November 2021
quotequote all
Not a clue. I'll see what it's all like when I pick it up I guess. A good run on the motorway will definitely happen, sounds like an Italian tune up will help but i thought I'd through some extra cleaner in there to help it out.

ssray

817 posts

198 months

Friday 26th November 2021
quotequote all
I used to run a few diesels on veg or a mix
I found mineral ATF(automatic transmission fluid) either fill the new fuel filter with it or add some to the tank, never took anything apart to check but it felt better or I've used this stuff on a motorbike, I know it was petrol but have a look
http://hildstrom.com/projects/seafoam/

Robotron70

1,460 posts

16 months

Friday 26th November 2021
quotequote all
I swear by this stuff, you can buy it on Amazon or directly -

https://www.hydra-int.com/maximus-diesel-power-boo...

And I don’t work for them laugh

JP__FOX

386 posts

208 months

Friday 26th November 2021
quotequote all
I tried some of the Wynn's stuff and it made a slight improvement... What really helped was taking it on a track evening and getting it hot! It's a Mini Cooper SD and the girlfriend normally uses it for short journeys and she even commented how much quicker it felt afterwards! Good fun too smile

MichaelXJ

Original Poster:

605 posts

79 months

Friday 26th November 2021
quotequote all
Robotron70 said:
I swear by this stuff, you can buy it on Amazon or directly -

https://www.hydra-int.com/maximus-diesel-power-boo...

And I don’t work for them laugh
I've ordered 500ml of it which should be good for a few tanks and only £11. Can't do any harm as you said and as it's on 220k miles I suspect it'll do it some genuine good

Gerradi

1,190 posts

93 months

Tuesday 14th December 2021
quotequote all
. BG244 Diesel Fuel Injector & Engine Cleaner..

Captain Answer

1,134 posts

160 months

Wednesday 15th December 2021
quotequote all
Always stick to using Forte stuff myself, diesel treatment alone or a pack like this would be my choice in your case... https://www.ebay.co.uk/itm/183175080547

I just put that pack into a Touareg I picked up, think it's been run short journeys on cheep fuel - seems the turbo actuator is a bit stiff, so trying this before going deeper with stripping/cleaning/reconditioning