UPMSXBriggs & Stratton Fuel Fit Additive/Stabiliser. 992381

This stabiliser seems to work well and does a good job. It is easy to use as there is a calibrated dispenser moulded into the bottle. Seems good value for money but you cant guarantee receiving a full bottle. Unfortunately, as others have mentioned, the product packaging is not very good and about 10% of mine had leaked by the time it arrived. Faulty seals under the screw caps were to blame. Be careful when opening for the first time.

Used this for years in lawn mowers and motorbikes EXCELLENT

Good quality product , protect,s engines.

I've been using this stuff for years on the recommendation of my bike mechanic. I run a 1983 Suzuki Katana which doesn't get as much use as I'd like & can go 4-6 weeks between runs (criminal) & is usually laid up during the winter. This has the effect of "gumming-up" & "varnishing" the fuel system, especially the carbs, resulting in a time consuming & COSTLY strip down & rebuild - believe me, I speak from experience. Big Pete put me onto this stuff after said rebuild & I use it throughout the season in both my bike (& my mower). I top my tank up with petrol, then add this when I get home at the end of a run, letting the engine idle on tick-over just to get it through the system.The other thing you may not be aware of is that petrol goes "off" in as short a space of time as a month - that's why if you leave fuel in your mower over winter, you will struggle to start it - this stuff will stabilise the petrol meaning that it remains fresher. Again, useful if you only manage to get out on your bike once a month.However, contrary to what other reviewers say, this product WILL NOT protect against ethanol corrosion (but see update below)- do not use this product thinking you are protected against Ethanol corrosion - "The 999005E 125ml fuel additive has now been replaced with a 250ml bottle under part number 992381. This new formula is designed to work with and protect petrol which contains up to 10% ethanol. Most current UK petrol contains 5% ethanol. The older additive did not offer this protection hence its replacement. Available to you via your normal supplier. I hope this helps." - (Briggs & Strattons' response to the request for clarification as to whether this product offers Ethanol protection). Ever heard of Ethanol Corrosion? If your car or bike is less than twenty-five years old , don't worry. If, on the other hand, you run a classic vehicle (& I don't mean 50-60 years old but on some, less than 25 years old. Best check the exact age for your own vehicle but generally anything from before the early nineties or anything with a carburettor)then you do need to be aware of this potentially costly issue. "The greatest risk from ethanol in unleaded fuel is corrosion from the prolonged storage of fuel in the fuel tank. Classic fuel tanks are commonly made up of lead/tin alloy plated steel that is susceptible to ethanol corrosion. Ethanol is also corrosive to other metallic components including zinc, brass, lead and aluminium which will degrade over time under prolonged exposure to ethanol. In addition ethanol will also attack non-metallic materials such as rubber, cork gasket & leather that can result in costly problems with fuel hoses, seals, washers and gaskets." (Millers Oils) - Technically, it's not the Ethanol itself that causes corrosion, but the water in the Ethanol.Do a bit of research & do something about it. You can either replace the entire fuel system or use an additive - I'm lazy so I use an additive. But not this one - it does not offer Ethanol Protection!! There are a few companies that offer additives (Millers, Frosts, Flexolite) - I use Flexolite, mainly because the mix ratio is low enough to be able to carry it with me whilst I'm out.So does this stuff work? Well so far the carbs have not have to be stripped & rebuilt again, so I'm going to say yes. But do some research about Ethanol in fuel systems - it will scare the pants off you. Please note - I am not an expert, but have done a lot of reading about it.UPDATE - 01.11.13In case you're thinking I've lost my marbles, this is NOT the product I originally reviewed. That has been replaced by the newer version which DOES protect against Ethanol corrosion as mentioned in the Briggs & Stratton email. I've left the original review in the hope that people will start to wake up to the issues surrounding Ethanol

This is the second bottle of Fuel Fit I've bought, the first one was from a bricks and mortar retailer, but this year the were only offering the small shot sized bottles. I use over 10 litres of petrol each year in my motor driven push mower. Each cut takes about one hour, so across the seasons I expect a lot from it. 100ml will treat 10 litres of fuel, so this bottle is good for a couple of years supply. I was told that people use the single shot size to put in the tank to get the mower through winter, ensuring it will start next Spring. That seems like false economy to me, as unleaded fuel is notorious for 'going off' if left unused even for a relatively short time. Fuel Fit treated fuel will protect your motor all year round, keeping the carb clean and ensuring better economy and easy starting. Ive used it in the mower since new and its never missed a beat. Starts first or second pull. If you've ever cursed at a non-starting motor thats been left over winter, chances are that either the fuel in the tank or container you're using has 'gone off'*. Use Fuel Fit and this will be a thing of the past.* For more info on what makes unleaded go stale over time just search for Fuel Fit on Youtube. And I'm just a happy customer, not connected with Briggs & Stratton.

Product arrived leaking into packaging which I initially gave a poor rating. However I have since tried it in two of my mowers, Mountfield and Hyundia and the result has been first rate. Both mowers run like when they were originally new. Fully recommended it despite delivery problem.

Some reviewers claim this product cures mower-engine "spluttering". I've been using this for about a month and haven't found that to be true, yet. Maybe continued use will make the difference. It's also claimed to make stored petrol last MUCH longer. Ask me in Summer 2025 if that's the reality (or not). Untreated, petrol has a self-life of only 3-6 months.One thing I would add.... the poor instructions provided. There's a diagram on the bottle, which seems to be saying add 10 mililiters of product to 25 liters of petrol. It would be very useful if this could be confirmed in the instruction's text - I can't see any mention, myself. They print the health-warning in four different languages, but miss out the most important bit of the text. Not very impressive!With some caution, I would say this is a worthwhile product.

Arrived in good time, well packaged. Does what it says on the label.