HYDRA EHN-99, 2-Ethylhexyl-Nitrate 99% Pure 2 EHN Performance Enhancer Cetane Booster Diesel Treatment Additive, 1L Treats up to 1000L.

Works...engine sounds smoother...and I think more economy achieved as a result of using it.

Excellent stuff after filling tank and adding this to my diesel tank after 2days of use it's gained more MPG with n more black smoke from exhaust when I put foot down absolutely recommend using this if you have a diesel vehicle I will continue to use this

Over a rolling 1000 miles my van used to average 52.2mpg. Started using EHN-99 and over the next 1000 miles I averaged 55.3mpg. Same 40 mile commuter route every day, similar speeds, weather and temperatures... vehicle runs smoother and can change up gear sooner without struggling. Only dropped a star as the dispensation method is messy and inaccurate.

HYDRA EHN-99: it does what it says on the tin. I actually get six miles per gallon more, and I get more mid-range torque too.

Good quality easy to use good results Always take extra care when working underneath high voltage power lines.

In the past I’ve bought other products for my old VW camper, but after reading the reviews, I decided to try this product. It’s been really good, it’s a little smoother starting and seems to run smoother too

I own a 16 year old 330d with 247000 miles on the clock which smoked something terrible when I accelerated, after some research I thought I would give this product a go and what a difference it had made. I still have some smoke but nothing like I had before, I would highly recommend and will be buying again. As guidance I used 200ml to 60 litres of fuel and I didn't expect to see results straight away and didn't until a week later and about 200 miles. I can't say I've noticed much of a power increase as the 330d had bags of torque anyway

would have provided more stars had the item actually bren delivered with 1 litre of the product!!! I thought when opening it it looked low so I measured it on very accurate scales and the total weight including all the packaging was 1008 gramms!!! 1000 gramms per litre of liquid and the small plastics filler nozzle weighed in at 13 gramms so the actual product was at even the higher estimate only around 930 mls of product!! Very annoying when you have paid for a litre yet been provided with less than this. I have ran several tanks and my mpgs have actually gone down even though I never change either my driving style nor route. This is worrying as now the rev gauge has started to fluctuate and that was after the second tank with this product. I chose a more expensive brand and up my mpgs went as well as stopping the rev fluctuations. I will most definetly not be using or recommending this product as it was a complete fail!!!