First time I used this product was on my fising boat's 115hp Evinrude that sat with untreated fuel in it for 9 months. I added the double dose to the tank and topped off with fresh fuel and left it in the tank for 2 days. Then took the boat out for the first time that year it ran kinda sluggish for about 300 yards then ""WOW"" it just took off like I hit the nitrous switch! I looked down at the tach and it was overrevving! I had to go from a 19 pitch prop to a 21 pitch prop! to maintain the same RPM at WOT even with 3 other fat [*] fishing buddies! Well worth the extra 4cents a gallon! My boat can sit all year and still fires right up! I use it in everything I own now. Cars, trucks, lawn mowers, snow mobiles and no more hard starts any more. Far better than Stabil's ethanol treatment but don't throw it away! Pour it out and use the bottle for the Startron. Makes it far easier to measure out accurately.

Used in a 225 OptiMax just before winter. I fish year round until hard water sets in. This means the engine must start in harsh conditions with air temps in the high teems to mid 20's at times. First thing I noticed was that the engine started much easier than in the past--no hesitation at all. 2nd thing I noticed was that there was no lagging until the engine was totally warm. In the past on cold mornings, the engine would want to ""die"" at full throttle--all that went away when I started using the Startron. Couldn't be happier.

Everything runs better/faster. Mixed it with my boat fuel and saw the difference the first time I took it to the lake. I now use it in my Harley, the mowers,tractor and truck. Noticed a difference in all of them. A great product

THIS IS INFORMATIONAL: ONCE YOUR GAS HAS REACHED THE POINT OF PHASE SEPARATION NO FUEL ADDITIVE CAN FIX IT. YOU MUST DUMP THE GAS. LOOK FOR ""GAS PHASE SEPARATION"" ON THE NET FOR MORE INFORMATION. DON'T BLAME FUEL ADDITIVES. THEY ALL ARE PREVENTIVE MEASURES TO KEEP YOUR GAS FROM PHASE SEPARATION.

I have used StarTron for about 8+ years now in my diesel trucks, transfer tanks, motorcycles and cars. My wife is not a diligent with the treatment and everytime I get in her car to drive somewhere there is usally hesitation and missing while going up hills. So far with the next tank of fuel and starTron added it clears the symptoms. The other success I have with StarTron is with my Diesel trucks. Every year here in Colorado diesel trucks have to go through exhaust checks. This truck has consistantly over the years been getting only 2-3% particulate reading. This by the way is very good. There is no perceivable smoke coming out the exhaust during eccelaration while looking in the rear view mirrors. The engine has nearly 200k on in with no improvements. The last example i have my the diesel transfer tanks have not accumulated and gelatinous slime on the walls upon inspection.

I use this product in my snowmobiles which are constantly exposed to sub freezing temperatures and have not had any starting or water problems. Most gas now has ethanol introduced for the winter months which in turn will destroy your engine (outboards included). A few bucks spent on this product is a great investment to help protect your toys!

I am a Mercedes Benz Master Guild Mechanic with 20 yrs. experience. I have been very displeased,as have been my customers, with the effects of ethanol on an engines performance and fuel mileage. One of my own vehicles, an Audi A6 Allroad has a 5 valve per cylinder 2.7l twin turbo engine which has never performed to my expectations regardless of how well it was ""tuned"". I generally don't buy into ""miracle claims"" of performance improvers. At best a good fuel system/injector cleaner is all I use and recommend. After reading these reviews I thought I might try Startron in my Johnson outboard which had some old fuel in the tank .On my way home I was fueling up the Audi, and I put Startron in it to see what, if any improvement there might be. This stuff is incredible, the car idles better, and has performance as though I increased the turbo boost...a lot. It pulls harder than it ever did in previous 70K miles . The engine runs smooth, more powerfully and I think it's getting better fuel economy, (hard to tell, my foots always in it because it's so much fun to drive now ! ) It's clear that this product does what it claims regarding performance, and I suspect it will help with water contamination issues as well. (but realize folks that if you have a fuel tank half full of water you probably need to drain it). I've told my Mechanic Buddies about this stuff and now they are using it as well. I haven't got around to putting it in the outboard because I used up the bottle on customers and my cars, but I will get more and try it in the boat, where I expect it will do great there also.

Have a 2000 Mercruiser 5.0 Injected that began stalling/no power, then eventually wouldn't start- even after installing a new fuel filter. The boat doesn't see much use annually, so the gas wasn't turned over much over the years (was always heavily dosed with preservative when winterizing). At recommendation of the marina I drained a bunch of nasties (1/2 gallon of brown water & particulate) off the bottom of the tank (45 gallons, full) then treated with large bottle of Startron. Burned the entire tank without any further problems. Marina mechanic calls it magic in a bottle & I agree. Recommended Startron to friends/family with small engine problems and they've all been happy. WHY are we using Ethanol??? Cons far outweigh the Pros...unless you are a corn farmer.

I've been using startron in my boat and hunting truck for two years now. Last year my boat didn't move for 9 months with 100 gallons of gas treated with startron sitting in there the whole time. When I did take it out it ran great with no problems and afterwards there was no water in the fuel seperator. Also treated the gas in my hunting truck the last day of season and it sat at the hunting camp until the next season. Unbelievably, I had no problems with it either.

My sons four wheeler sat all winter and when I tried to start it it wouldnt idle and ran terrible. Put an oz. or so into the gas tank and 2 minutes later it was running like new. It almost worked too fast. I am going to see if it did the trick. If it is the reason why it is running good I will put it in all my quads and recommend it to all my friends

Read about it, Heard about it from local boaters, wasnt real happy with how my car engine was running with all the ethonol they put in todays gas, said to myself, self lets try some Star-Tron in there, Wham noticed a difference right away, vehical runs smoother and responds quicker, very pleased and will continue use of this product with each and evey fill-up.

I have a 1993 buick Lesabre. All of a sudden I was getting power loss when stepping on the gas, and a little bucking, fuel filter was changed, fuel pressure was checked and found within range. Put star Tron in the gas as recommended, and the problem cleared itself up. I wouldn't have believed if I had not used it myself. Every once in a while I get the same problem, and put Star Tron back in the gas, and back to peak performance. I would highly recommend this product.

Look at the MSDS of this product - 99% mineral oil and .5% ""proprietary ingredient"". Looks like snake oil, sounds like snake oil, lo and behold this product is snake oil. Put it in my boat and what happens? Keeps stalling. Thank you Startron for selling snake oil with false advertising.MSDS here:[@]

Poured this in my boat that had phase separated fuel in it. It claims to ""remove water"" but all I saw was the same two layers that were there before. Poured some more in to see if it needed a higher dosage and ran the boat - it didn't even start. Thank you Startron for making a snake oil that claims to be the best ethanol gas treatment available but proves nothing!

i use this product in all my small engines and it does a very good job keeps the engines running smooth

My four stroke outboard has never run this smooth and the fuel tank and system have remained trouble free over 2 years. My friend in the slip next to me found out the hard way about the new lousy fuel problems, now he is a believer too!

This stuff works great I use it in my motorcycle I bought a used 99 honda vt1100 shadow and guy that had it let it sit for 2 years with the ethnol gas in it and it ran rought and wouldn't idle. I didn't feel like pulling the carbs so a motorcycle shop told me to try this. I drained the tank filled it and added this stuff and in 3 days the bike ran like new. I had a buddy this weekend I road with had a missing problem and we added some of the star tron to his tank and by days end the bike was running great. it's great stuff.

When I layed up my boat last season I applied Star/Tron to my fuel tanks. This year I had to empty one of my 100 gal. tanks and I was amazed how clear and fresh the gasoline appeared. After refueling with the same fuel both engines started and ran smooth.

I own a twin Engine Yamaha jet boat, Filled the gas tank the other day and the motors started running really rough. Thought it was bad gas...OH NO!!! Real tuff to drain a boat's gas tank!!! It was stalling and not running at idle, it would just quit.!! Went to the local boat mechanic and he said try a bottle of Star Tron in the tank. 3 days into running, no more stalling, no more rough starts, and Best Yet, the engines haven't sounded this good since I bought the boat new. (3 years old)I'm then put some in the kids 4 wheelers and the oldest machine starts on the first pull. It's never done that before...So I'm soldIf you are having issues with Marine engines and Ethanol gas...Give StarTron a try before you pull the carb and spend a ton of $$$ taking the carb apart. I'd give this stuff a try, for [$] a bottle it'll be worth the effort, but try to find a store that carries it !!! Order on line....

It says what it does and does what it says. My old flathead six never ran better.

If you buy this for the stated purpose, you'll come back for more -- I did. I own a Chriscraft (1963, T327 ) inboard that hadn't had much use for a couple years, and I needed to run it 80 miles to it's home dockage. After several failed attempts due to motor problems, and after all the usual things were checked and adjusted or cleaned, I added Startron. After the 80 mile run, it ran great and still does. I did have to readjust the carbs after the trip to lower RPMs, probably due to cleaner jets, but that's about it. Now I'm down to the one 8 oz bottle for every 250 gallons of fuel, just to maintain the system, instead of the the initial 8 oz per 120 gallons, and I convinced my local marian to start carrying Startron.

This is a great stuff, I will buy more. I currently use it in my boat and diesel pickup. I have notice and increase in mileage and smooth operation of both boat and truck.

Last spring I had the carbs on my 2002 merc 40hp 4 stroke re-built due to hesitation and overall poor running. I got it back and it ran ok, just ok for most of the season. last fall I bought some Star-tron and put it in the gas. It seemed to run much smoother no more hesitation. I stored it last winter with startron in the gas. This spring it started right up and runs perfect. I really think the startron is great. I put it in my 4.3 mercruiser (carburated) and the motor has never run better! I'm definately a believer!!

I can honestly say i dont know if it works, but what i can say is that i keep my engine in top condition all the time and have been using this stuff since it came out due to the oxygen additive and had no problems so does it work i dont know but i will keep on using it thats for sure 150 merc o.b.

I usually complain more than compliment, but in this case I have to take my hat off and bow to this stuff and write a review. I have been using Star Tron for about 6 months in my boat (1999 Yamaha 200 outboard 2 stroke.) Right away I noticed that it was easier to start, especially when I let it sit for a few months during winter. It also runs smoother. Very noticeable and will keep using it in boat. (I used to have to Starting Fluid and change the plugs if it sat for too long, bad I know :( but now it just starts quick every time like it was warmed up.) But the big visible difference is when I put it in my friends F150 pickup. It was running poor with hesitation and sluggish. I thought it was going to stall in the middle of an intersection. It always died on hard acceleration. I put in ONE treatment of Star Tron. Half a tank of gas later ALL THE PROBLEMS WERE GONE! Not just less, but GONE! We were both shocked actually. I thought it might help a little, but it went way past helping.most of my friends carry a bottle in our trucks. ALSO, I use it in my lawn mower, weed eater and chainsaw. They run smoother and always start after sitting. The first fuel additive that really does something noticeable.

It's hard to review something that prevents bad things from happening but I've been using this for a couple of years on my Johnson outboards (2 and 4 cycle) and have no water or storage problems