HYDRA MAXIMUS fuel injector cleaner for cleaning diesel injectors performance enhancing diesel turbo cleaner additive for diesel fuel EGR valve cleaner diesel engines 2x500ML Treats UpTo 500 litres

So I mixed this in half a tank of fuel, in two cars, and the result was! Well to be honest I'm not sure! I would like to think it has made a difference but I'm not quite sure what that difference is. Can't say I've noticed any real improvement in MPG but then I have to say that in the V8 the engine does seem to be a little more free revving, or is it my imagination, so one tends to make use of that which would negate any gain in MPG. In the smaller SUV I've not done as many miles but again I would have to say even after only 50/60 miles it does appear to be more free revving which can only mean that the injectors have been cleaned and are perhaps working better than they once were! Both vehicles have low mileage, 68,000 and 42,000 respectively. Let's use the entire bottle and see what effects a few hundred miles on each vehicle produces before I praise or condemn the product.

This is good stuff. Within about 50 miles of adding a dose, it feels like driving on premium fuel. Much quieter at idle. Much quieter on acceleration.Smoother power delivery.Not fussed about mpg but when acceleration is so easy I tend to use less throttle. I did 50 miles mixed driving in city and out of town mixed and mpg increased from 45.6 to 50.3. Average 20mph in town and 60 to 80 out of town.This feels smoother than using millers diesel additive.

I drive a black cab and ive covered almost a million miles in same cab this stuff is ok but its expensive i used the whole bottle within 3 days so not cost effective and saw or felt any difference over the hydra diesel

I purchased this with a view to swopping my diesel purchases from a "Premium" grade to "Regular". Suddenly, the BP Premium diesel has risen to over £1.40 a litre in this area, around 12p a litre more than regular fuel. I now buy regular diesel and add this. This product adds only around 5p to the regular diesel's price, so it will quickly pay for its self. The engine runs as smoothly as it does when running on "Premium" and I'm saving around 7p/litre. I think this would slightly improve the performance if you normally buy Regular, so well worth the initial investment.

I have been using this product consistently for 15k miles in a new BMW and the engine has run with no loss of power or responsiveness to accelerate when driving mainly short runs where the engine did not reach peak running temperature. Whilst it is difficult to guarantee that the product has directly helped to keep the engine running smoothly, its use has at least provided some piece of mind between the regular servicing intervals. I will happily continue to purchase more.

Didn't buy this for the mpg element, so can't comment on that part. Has definitely made my old 200k focus tdci 05 run smoother and feels close to what a remap would feel like bearing in mind the car is over 15 years old and has about 116bhp stock. Just make sure your get your measurements correct when filling up. Use the other diesel product they offer if increasing your cetane levels are if no interest to you.As a side note, she idles better ever through winter since using.

Highly recommended. My engine runs smoother, quieter and definately feels more powerful. Highly recommended

Seems to work, especially after a cold start the diesel knock is greatly reduced