Gumout Multi-System Tune-up 16 oz Automotive Additive - 510011W

has a decent amount of carbon cleaner PEA i think its called. use in gas tank or with oil. i put in a whole can @1/4 tank and the whole bottle in crank case about 200 miles and drive before changing oil last time because i ran out of transmission fluid. it did dissolve a good amount of varnish in motor that stuck to drain pan. you will need to use a funnel to put into your gas tank. use in anything that runs on gas, like lawnmower before oil change. it may smoke a bit, but thats from carbon buildup

Best value for fuel system/engine cleaning. I've used it every other oil change for a couple of years. I put one ounce per quart of oil in the crankcase and the rest in the gas tank until I need to refill, then change the oil. My engine has a known oil consumption issue but has been cut from losing a quart of oil every 1000 miles to every 2000. I do delivery/lots of idling and low-speed driving and always notice quicker starts and more steady RPM at stoplights after treatment. A separate fuel cleaner and engine flush would cost well over twice as much and be no more effective. I highly recommend this stuff over Sea Foam. As a bonus, a drop or two works great as a cleaner/lubricant/penetrating oil for chains, hinges, etc.

This particular Gumout product contains polytheramine which is the same as Techron. It dissolves carbon like hot water melts ice. You have to have a drip system to inject it into the intake manifold at a steady drip. Cleans the valves and the catalytic converter. At my shop where many cars come in with P0420 codes it solves the problem. One treatment can last as long as 6 months. No need to replace the cat if it is not broken or clogged. Vehicles with direct injection is almost every vehicle today the intake valves coke up. The engine develops a bop at idle it cleans that too. Great stuff.

I tried it for my lawn mower and so far so good. Last year my mower wouldn't start so I bought a cheap carb from Amazon for about $20 and it ran like a champ all season. After sitting the winter it started up just fine and ran fine for about a half hour until I took a break. After about a half hour sitting idle, it was extremely hard to restart, nearly impossible - something was wrong! Strangely after sitting for a week, the mower started up just fine, but had the same restart problem after sitting idle for about a half hour or so during my break. Note: the condition/level of the oil was fine and I replaced the spark plug. So I guessed that maybe the carb was a little gummy (I wasn't about to take it apart to clean!). So I tried this instead of replacing the carb again. So far, so good after about three weeks of mowing - no issues. This seems to be a good fix for me (so far).

I use this in all my vehicles and never any negative issues. Would recommend this product each month to keep injectors clean and aids in better mileage.

This is great stuff that does exactly what it says it does. I run a can with every fill up in my auto and it's running noticeably better since I began this regimen. Walmart had it at a great price, and delivery was extremely fast. I'm thoroughly please with this product and with Walmart's performance.

Because of a video on The Scotty Kilmer channel on YouTube I tried this. It has an ingredient called PEA and any fuel system cleaner which has this chemical says so on the front as this one does, and is one that will actually work for you. None of the other ones are worth the money. I used this in a very old rototiller which had not been running properly for a long time, it would barely run without the choke being almost completely on and made no power. I added a few tablespoonfuls to the gas tank and within two minutes I had to open the choke wide because the gas was flowing and the rototiller was running like it had not run in many years. This particular brand of fuel system cleaner seems to be the best value based on quantity and price. Don’t waste your money buying any such product that does not have this PEA ingredient. This stuff works.

I have been using this product for a few years, and it does wonders, keeping my motor clean and my fuel system.

Didn't seem to do anything. Didn't increase gas mileage. didn't reduce engine carbon or sludge (oil looks the same). Was unsure about oil change interval after adding to oil. Called company and left Voice mail to find out, no reply from them at all. Did 3 oil changes with product including adding to fuel on a 2006 Chrysler 3.8 V6. used a total of 3 cans.

The product itself is good but Walmart delivered three out of six cans all dented up which could be dangerous if they leak in transit. So I'd suggest buying these in person and not risk the leakage.