Unfortunately, this deal is no longer available
Redex Diesel System Cleaner at Asda for £2
292° Expired

Redex Diesel System Cleaner at Asda for £2

£2£333%Asda Deals
42
Posted 8th Sep 2019

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Redex is the number 1 market leader in UK fuel additives and has been helping cars to drive further since the 1920s. Adding Redex Diesel System Cleaner to your tank regularly can help to keep your car fitter by caring for it inside and increasing fuel economy.

Cleans fuel system
Reduces emissions
Restores performance
Improves the life of your engine

Petrol version also £2
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i got a better deal. Don't use such rubbish.
42 Comments
Same price at Wilko too.
i got a better deal. Don't use such rubbish.
dave_stuf6708/09/2019 10:56

i got a better deal. Don't use such rubbish.


Well...share it then! I'm all ears
Petrol price? I know they were both £2 in Morro's until a few days ago.

Heat OP! I like this stuff straight, with a lemon twist
If you have Costco membership this is a poor deal. Costco currently sell a pack of 4 bottles that are 4 shots each for £12. These £2 bottles are 1 or 2 shots at best.
The.Lone.Ranger08/09/2019 12:52

If you have Costco membership this is a poor deal. Costco currently sell a …If you have Costco membership this is a poor deal. Costco currently sell a pack of 4 bottles that are 4 shots each for £12. These £2 bottles are 1 or 2 shots at best.


I use there fuel which states it has additives in. Does this do anything more than there premium diesel? Which is the only diesel they sell
Donniey08/09/2019 13:07

I use there fuel which states it has additives in. Does this do anything …I use there fuel which states it has additives in. Does this do anything more than there premium diesel? Which is the only diesel they sell


Not sure. Redex is supposed to break down gunk and clear the filters, not sure if the fuel also does this.
PaulandPam08/09/2019 13:00

[Image]


Have you done a search around the internet to see any real tests on Redex? I think you would be hard pushed to find one that doesn't show any kind of improvement over a long term test.
The.Lone.Ranger08/09/2019 13:24

Have you done a search around the internet to see any real tests on Redex? …Have you done a search around the internet to see any real tests on Redex? I think you would be hard pushed to find one that doesn't show any kind of improvement over a long term test.


Yeah I’ve read around it. During my service the mechanic normally uses flushing fluid and leaves the car running for 15/20 which does a similar thing I believe? But maybe mistaken.
Donniey08/09/2019 13:40

Yeah I’ve read around it. During my service the mechanic normally uses f …Yeah I’ve read around it. During my service the mechanic normally uses flushing fluid and leaves the car running for 15/20 which does a similar thing I believe? But maybe mistaken.


I think you are supposed to use this every time you fill up for best results.
Just run Vpower, BP ultimate etc etc
It's all I use. The difference in price over a full tank is marginal.
Is this ok for all diesel cars?
Lots on American websites about these 'miracle additives' , seafoam being their favourite,many high mileage motors fixed simply by adding this snake oil,no doubt someone with now put up a link to the test fifth gear did on redex showing a marginal improvement. Regular oil and filter changes,running your car for at least half an hour to get everything warm and a few fast runs up an A road or motorway soon sorts things out,especially those people mugged off into buying a diesel car with a dpf for town use....
Donniey08/09/2019 13:07

I use there fuel which states it has additives in. Does this do anything …I use there fuel which states it has additives in. Does this do anything more than there premium diesel? Which is the only diesel they sell


theretheyretheir.com/
You will gain more mpg by checking your tyre pressures regularly or even putting in a few extra psi for less rolling resistance.
Besford08/09/2019 16:32

http://www.theretheyretheir.com/


Thought that when I wrote it, then I thought cba to amend.
Edited by: "Donniey" 8th Sep 2019
I was advised to use this in my M5, and it screwed up the whole EMS and fuel lines...

Use with caution...

Kindest regards
dave_stuf6708/09/2019 10:56

i got a better deal. Don't use such rubbish.


My car would not have passed the emissions test of the MOT without redex. It saved me hundreds of pounds.
Edited by: "dz1" 9th Sep 2019
Phlop008/09/2019 14:37

Just run Vpower, BP ultimate etc etcIt's all I use. The difference in …Just run Vpower, BP ultimate etc etcIt's all I use. The difference in price over a full tank is marginal.


This would work out cheaper, but not sure if it's as good.
firstofficer08/09/2019 17:45

I was advised to use this in my M5, and it screwed up the whole EMS and …I was advised to use this in my M5, and it screwed up the whole EMS and fuel lines...Use with caution...Kindest regards


Sounds like you shop and unfortunately listened to the advice the Halfrauds chimps spouts out to unsuspecting naive motorists .;)
dz108/09/2019 18:09

My car would not have passed its MOT without redex. It saved me hundreds …My car would not have passed its MOT without redex. It saved me hundreds of pounds.


Would you like to elaborate??

Kindest regards
as yourself the question does a small company that doesn't even have a proper test lab with engine test beds, chemists, statisticians, scientists etc know more about additives than the major refiners or additive companies like Lubrizol that spend millions on R&D and testing to improve fuels and additives.Its been the same formula for years yet engines have changed. Even if there was a patent on the formula it will have expired and anyone can add it to fuel at the refinery. If it had any effect then don't you think it would be added to fuel already? If it had any scientifically proven effect the fuel companies would be advertising their fuel "now with added Redex". Its basically red died paraffin. Tests like the 5th gear one don't apply any proper stats. They showed an improvement much lower than the standard deviation of the multiple tests they did. AKA in the statistical noise. I have worked on engine test beds for an oil company and the scientists would just laugh at you if you used it. There are far more sophisticated additives and detergents already in fuel. Fill your tyres up with Helium, it will make your car lighter and improve your fuel consumption, clean polish your car it will reduce air resistance and improve your fuel consumption, dont drive in rain, the raindrops will increase your fuel consumption. They are more scientifically valid than this junk.
dave_stuf6708/09/2019 18:54

as yourself the question does a small company that doesn't even have a …as yourself the question does a small company that doesn't even have a proper test lab with engine test beds, chemists, statisticians, scientists etc know more about additives than the major refiners or additive companies like Lubrizol that spend millions on R&D and testing to improve fuels and additives.Its been the same formula for years yet engines have changed. Even if there was a patent on the formula it will have expired and anyone can add it to fuel at the refinery. If it had any effect then don't you think it would be added to fuel already? If it had any scientifically proven effect the fuel companies would be advertising their fuel "now with added Redex". Its basically red died paraffin. Tests like the 5th gear one don't apply any proper stats. They showed an improvement much lower than the standard deviation of the multiple tests they did. AKA in the statistical noise. I have worked on engine test beds for an oil company and the scientists would just laugh at you if you used it. There are far more sophisticated additives and detergents already in fuel. Fill your tyres up with Helium, it will make your car lighter and improve your fuel consumption, clean polish your car it will reduce air resistance and improve your fuel consumption, dont drive in rain, the raindrops will increase your fuel consumption. They are more scientifically valid than this junk.


In that case, as it’s only two quid, I think I’ll give it a try.
I've seen nitrogen tyre filling advertised locally....

...where can I get them filled with helium ?
If you look in your car's handbook your pretty certain to find that they tell you NOT to put additives in the fuel. I think I'd choose to follow that advice.
dave_stuf6708/09/2019 18:54

as yourself the question does a small company that doesn't even have a …as yourself the question does a small company that doesn't even have a proper test lab with engine test beds, chemists, statisticians, scientists etc know more about additives than the major refiners or additive companies like Lubrizol that spend millions on R&D and testing to improve fuels and additives.Its been the same formula for years yet engines have changed. Even if there was a patent on the formula it will have expired and anyone can add it to fuel at the refinery. If it had any effect then don't you think it would be added to fuel already? If it had any scientifically proven effect the fuel companies would be advertising their fuel "now with added Redex". Its basically red died paraffin. Tests like the 5th gear one don't apply any proper stats. They showed an improvement much lower than the standard deviation of the multiple tests they did. AKA in the statistical noise. I have worked on engine test beds for an oil company and the scientists would just laugh at you if you used it. There are far more sophisticated additives and detergents already in fuel. Fill your tyres up with Helium, it will make your car lighter and improve your fuel consumption, clean polish your car it will reduce air resistance and improve your fuel consumption, dont drive in rain, the raindrops will increase your fuel consumption. They are more scientifically valid than this junk.


It would be spectacularly easy for Redex to prove this stuff works.

Take some dirty injectors from an old, well used engine, set it up in a lab flow test chamber like below, then pass through 40 litres of fuel with one bottle added.

Post a nice time lapse video on YouTube followed by before and after close ups and voila! Proof.


38423793-ABKAS.jpg
Redex would 100% do this if the stuff works. Easy proof.

So, anyone here ever seen such evidence?
Edited by: "KingBurger" 8th Sep 2019
This is boring every time a redex deal is posted the same snake oil discussion. The price is good if you use it.... the deal is hot!
gcmarcal08/09/2019 23:18

This is boring every time a redex deal is posted the same snake oil …This is boring every time a redex deal is posted the same snake oil discussion. The price is good if you use it.... the deal is hot!


Would a chocolate teapot get voted hot if it was cheaper than other chocolate
Teapots? It’s a bad deal.
on this site? yes!
Have a bottle of this in the back of my car, but only in case of cold weather as will stop the diesel freezing in cold weather eg -15 and below, not nice when that happens 😫 don’t believe the gumbo about cleaning and making engine more efficient Mind you with global warming and all nevertested this fact 😁 😁
Edited by: "drdquine" 9th Sep 2019
It’s worth noting that

A) This is unlikely to do much
B) Additives in fuel like vpower are also debatable.

Why? Engines detergent tests like the ASTM D6201 (gasoline) or CEC-F08 (Diesel) require the additive company to “dirty” the engine up. Problem is, there is not set way or method to dirty this up and obviously detergents will respond to dirt in different ways. You obviously pick the best girl to dirty up that your detergent can clean off quickest and easiest.The “dirt” can also be questionable too.

MPG increases are possibly seen due to cleaning up of the engine (dirty injectors causes poorer combustion) and some have a friction modifier in to help lube the pistons.

Anyway, detergents in fuels do work, just not perhaps as good as it says in the tin.

Your mileage may vary (quite literally)

(For best increases, insure tires are correctly
pumped up, oil/filter change and your driving ability)
Besford08/09/2019 19:48

If you look in your car's handbook your pretty certain to find that they …If you look in your car's handbook your pretty certain to find that they tell you NOT to put additives in the fuel. I think I'd choose to follow that advice.


I checked my handbook and it doesn’t, so it must be ok in mine.
KingBurger08/09/2019 19:53

It would be spectacularly easy for Redex to prove this stuff works. Take …It would be spectacularly easy for Redex to prove this stuff works. Take some dirty injectors from an old, well used engine, set it up in a lab flow test chamber like below, then pass through 40 litres of fuel with one bottle added. Post a nice time lapse video on YouTube followed by before and after close ups and voila! Proof. [Image] Redex would 100% do this if the stuff works. Easy proof.So, anyone here ever seen such evidence?


It wasn't hard to find proof it works.

Edited by: "dz1" 11th Sep 2019
dz111/09/2019 22:13

It wasn't hard to find proof it works.[Video]


LOL. There is no proof there whatsoever. On power runs at different times there are far, far too many variables for that to ever possibly be considered conclusive. So many environmental and physical variations make it an utter nonsense. That well known video has already been mentioned twice earlier on in this thread and treated with the disdain it deserves.

dave_stuf6708/09/2019 18:54

~snip~ Tests like the 5th gear one don't apply any proper stats. They …~snip~ Tests like the 5th gear one don't apply any proper stats. They showed an improvement much lower than the standard deviation of the multiple tests they did. ~snip~

Edited by: "KingBurger" 12th Sep 2019
KingBurger12/09/2019 06:31

LOL. There is no proof there whatsoever. On power runs at different times …LOL. There is no proof there whatsoever. On power runs at different times there are far, far too many variables for that to ever possibly be considered conclusive. So many environmental and physical variations make it an utter nonsense. That well known video has already been mentioned twice earlier on in this thread and treated with the disdain it deserves.


They mentioned the video but for some reason they didn't want people to see it. So here it is. Let people watch it and make up their own minds if it shows proof or not.

By the way, he already said in the video that the results are corrected for environmental factors. Maybe you weren't paying enough attention.
Edited by: "dz1" 12th Sep 2019
dz112/09/2019 13:28

They mentioned the video but for some reason they didn't want people to …They mentioned the video but for some reason they didn't want people to see it. So here it is. Let people watch it and make up their own minds if it shows proof or not. By the way, he already said in the video that the results are corrected for environmental factors. Maybe you weren't paying enough attention.


Conspiracy theories and very low standards for proof. Here's hoping you're never a juror in an important case.
KingBurger12/09/2019 17:39

Conspiracy theories and very low standards for proof. Here's hoping you're …Conspiracy theories and very low standards for proof. Here's hoping you're never a juror in an important case.


As i said before, without Redex my car would never have been able to pass the MOT emissions test after it had failed it There is no higher standard of proof for me than that.
Normally sceptical on this sort of thing but having bought an old diesel cooper I noticed it had an annoying flat spot around 1200rpm. A bottle of this and it was sorted.

It was also clearly knocking out soot as the boot was covered and the exhaust was black. Ran some DPF cleaner through and did some longer runs and that has also completely stopped, passed MOT no advisories.
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