Red ex Diesel Fuel additive

Stevieb

Member
Bought some of this snake oil in Aldi (2 for 4.99) and added it to a tank of non supermarket fuel. Took the car for a run and the engine appears to run smoother and is less noisy.
Same thing with my A4 PD 1.9.
And reading the Fifth gear test on a Corrado 1.8 it gave impressive dy no improvements . The video is on You tube with Jason Plato leading the tests.
So once I get my undershield fitted this Friday I'm hoping for a significant reduction in engine noise.
Only problem with Red ex you can only use it once in a while.
 

audifan

A2OC Donor
Not knocking any fuel additive, but there is always the chance of the placebo effect. Perhaps a cheaper or cleaner way of doing this is to fill up every so often with super diesel as this contains a blend of additives already there by the fuel companies. I am not saying any or all work, you pay your money and judge for yourself. Engine noise can be down to many different things including exhaust condition, oil grade, engine wear, tappet noise, engine temperature etc.
 

johnyfartbox

A2OC Donor
Whoops, 2 quid each in tesco at the moment.
I put a blob or two in the tank with every third 20 quids worth
Never done any harm AFAIK.
 

EamonnDH

Member
It works, just remember you can't clean something that is already clean. Though I pick up a bottle every time it's on offer, and with how good the MPG is on the A2 I run only V-Power so it might be a waste for me. At £2 it's hardly a big deal if it doesn't help much.
 

Au2ro

Member
I use Redex diesel every few months and always just before MOT just in case of smoke test issues, not that I have ever had any issues but feel it's like an insurance against it - probably placebo effect. But I do buy cheap fuel so feel that it helps. After hearing my garage mechanic moan about cheap fuel I told him that I use Redex and he commended me for doing so saying that he wished more of customers used it, so that reassured me a bit that I was not wasting my money.
 

Techno

Member
This contains the active ingredient for Cetane enhancement

HYDRA Fuel 2 EHN 2 Ethylhexyl Nitrate Cetane Enhancer Fuel Additive

A litre can be had delivered for around £13. At a dose of a ml per litre of Diesel (say 30ml per tankful) its going to last me a long time, something like 10,000 miles.
Last years MOT smoke test returned the lowest smoke result in the last five years of tests that I've had my car tested at the same MOT station. A fluke? We'll see, as I'm not intending to move the car on.

I would say the PD engine is less clattery as well.
 

EamonnDH

Member
This contains the active ingredient for Cetane enhancement

HYDRA Fuel 2 EHN 2 Ethylhexyl Nitrate Cetane Enhancer Fuel Additive

A litre can be had delivered for around £13. At a dose of a ml per litre of Diesel (say 30ml per tankful) its going to last me a long time, something like 10,000 miles.
Last years MOT smoke test returned the lowest smoke result in the last five years of tests that I've had my car tested at the same MOT station. A fluke? We'll see, as I'm not intending to move the car on.

I would say the PD engine is less clattery as well.
While EHN is pretty good, and incredibly cheap, you're missing the detergents and other bits. That is if redex even has such things.
 

johnyfartbox

A2OC Donor
So let's get this right.
A drop of EHN.
A drop of redex.
And a drop of two stroke oil.
I should have the cleanest best running Tdi in the forum.
 

EamonnDH

Member
So let's get this right.
A drop of EHN.
A drop of redex.
And a drop of two stroke oil.
I should have the cleanest best running Tdi in the forum.
Redex has EHN in it. Personally I'd not use the two stroke. Using 2 stroke in diesel is old school voodoo, might get away with it on these PDs but it's still not a good idea.
 

EamonnDH

Member
Define not a good idea

"The results of the study support a view that the practice of dosing diesel with 2-stroke oil is surprisingly ineffective in terms of lubricity and cetane improvements. Engine performance, fuel consumption and emissions were also unchanged; however the use of 2-stroke oil in diesel is potentially harmful to modern diesel injection equipment. Trace amounts of zinc, an element which is found in most 2-stroke oils, are well known to cause injector nozzle fouling and the study measured high levels of injector fouling when the test engine was running on diesel dosed with 2-stroke oil. While the oil industry may not mind the additional revenue from the sale of 2-stroke oil with each tank of diesel, this study demonstrated that it is not in the best interest of the user to do so."
 

EamonnDH

Member
You can get away with it on an A2 as there's no DPF and it uses an older more tolerant injector design. If you add 2 stroke to a DPF and common rail equipped car you'll seriously reduce it's life span, plus that of your injectors.
 

Stevieb

Member
My Tdi 90 is definitely less clattery and having the new undershield fitted tomorrow.
But how can I continue with the Effect. Regular dosing or Shell V power ?
 

EamonnDH

Member
My Tdi 90 is definitely less clattery and having the new undershield fitted tomorrow.
But how can I continue with the Effect. Regular dosing or Shell V power ?
I'd personally go with the V-Power as their diesel in particular is a more reliably refined cleaner fuel, instead of whatever chip fat Asda filled the tanks with that week and a bottle of soap. From what I've seen VP has the lowest amount of junk/ash left over after combustion.

And please ignore the people who tell stories about "ooo I know a bloke wot works at the refinery and its all the same stuff even goes in the same truck". It isn't all the same, that's only true of some of the supermarkets that share a singular supplier.

The likes of Shell and BP have their own supply lines, base components, and additive packages. Even if they did come from the same refinery, the Coca-Cola factory in London makes coke zero and Fanta on the same production lines. Does that make coke and Fanta the same thing?

Regards,
Someone who spent far too long looking into where petrol/diesel comes from and what's in it.
 
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