"With the increasing prices of repairing damaged fuel systems due to poor-quality fuel, Water Watch is a small insurance policy that provides peace of mind while on the road. Thank you to the staff for recommending the system I purchased, which is fit for purpose"

"We picked up some dodgy fuel while doing a Kumho tyre test in western NSW. The alarm went off and we killed the engine immediately. In the bowl a tiny amount of water showed up as a silver layer - looking almost like mercury. We unclicked the electrical plug at the base of the unit and unscrewed the drain cap to let the water flow out. Then we tightened the drain cap, reconnected the electrical plug and away we went. The whole operation took around five minutes. We like the Water Watch very much and look forward to its fuel system protection, hopefully, for the next 15 years!"

"Been really happy with my Water Watch unit. It’s saved my engine from damage after picking up a bad batch of fuel from a ‘reputable’ service station. After sale support is first class. Would recommend without hesitation"

"Water watch has saved my fuel system for the second time in 4 years. After the alarm going off I was able to stop the vehicle and remove the water from Water Watch, change the fuel filter and continue on my trip without further problems"

"After an unexpected, and expensive misfueling episode on our 2017 Prado, a friend recommended this product. It arrived promptly, and was very easy to install with the enclosed instructions. It is a well engineered, quality bit of kit, and works exactly as promised. The four catches need to be engaged with the correct (diesel) nozzle for the fill flap to open. Definitely an investment that WILL save you both time and money."

"Excellent product, easy to fit and to use on our Prado 250."

"I purchased a diesel fill cap 5 years ago after filling a Subaru Forester diesel with a full tank of petrol. Almost $1000 wasted. This product is inexpensive insurance to stop you inserting a thinner petrol pump nozzle. It's happened to other people I know too. MUST HAVE ITEM if you own a diesel. Video on my ecopenny YouTube channel."

"This was the 2nd one I have purchased, the first one for a Mitsubishi Challenger the 2nd a Pajero sport I have found them excellent with one incident which saved me from putting petrol in."

"Prado was idling rough at 8 & 9. So put 19 to 20ml of your fuel additive into the Prado's 150 litre tanks and at approximately the 3km mark the engine started sounding a lot more smoother, and at the end of the 8k drive I let it idle for a few minutes and the engine was purring, sounding so much more smoother, and it's idling was smack on 7! So am very pleased! Absolutely brilliant additive! Huge thank you to Responsive Engineering!"

"I’m impressed how 10ml can make such a difference on diesel RAV4 from usually 5.8 down to 4,9 l/100 unbelievable and so much smoother and I’m usually very sceptical about snake oil."

"To early as I only put it in yesterday however when you send an email enquiry and get a phone call to answer any questions that will do me. Great service which is rare these days 🤩🤩🤩🤩🤩"

"After one 10 ml additive the results were immediate on my feel. I did realtime testing thinking a placebo effect, but no after adding the responsive additive consumption went down to 8.4 lts per 100 km , hey even the original 8.9 lt per 100 km I am happy . In my opinion the product works as stated and now will do my other family member cars . Will do more investigating on there fuel watch alarm product."