Royal Purple Max-Clean Fuel System Cleaner & Stabilizer, 20 fl oz

I had been using Lucas upper cylinder lubricant with injector cleaners after reading favorable reviews. It didn't work well for my 2020 Ford Explorer ST as it had developed a pause during acceleration so I tried Royal Purple brand and acceleration has improved significantly. I recommend this product.

When my Chrysler town and country mini van kept throwing the code for the catalytic converter I used this three times (1 time a month for 3 months) the code went away I got much better fuel mileage smoother idling and just all around smoother running

I think this actually did help a bit after two doses (fill-ups) It seems to have helped the engine run smoother and a little more pep. I didn't notice anything after 1 treatment. My car is 10 years old and has about 100,000 miles but no big problems; just wanted to see if a little extra easy cleaning of the fuel system would help. I intend to use fuel treatments every other tank going forward.

Ethanol will gunk up your fuel injectors. I use this or one other about every other oil change. I can't remember the stuff in it that is actually doing the work, but there are only 3 or 4 products that I've found that have it. You won't know how much your fuel injectors were clogged until they're clean again.

Having tried many similar products on the market, I was skeptical about spending money on another lackluster product. But this one did provide noticeable results in my 2008 Maxima. I filled the tank, added the full bottle and took it on the freeway for a few miles of spirited driving. Now the engine has better throttle response.

I was hesitant to try this product. So often they don't do what they claim, but this works. My F-150 was not running up to par so I tried Royal Purple and by the time I ran one tank of gas through the truck, it idles perfect and the milage has even improved

If you have an older vehicle that is getting terrible gas mileage this is the miracle fix. I put this in my 200,000 mile car that was down to about 1516 miles to the gallon now I'm getting 18 miles to the gallon. This stuff is amazing. It is the only stuff I tried that cleaned my fuel injectors

Really cleans your engine. Youtube it. Works better than all other brands because of the PEA. If you can't buy this one get the Chevron with Techron one. They really work. Most of these products don't list that they have PEA. This one does though. Noticed a huge difference in just how my engine runs and gas mileage. No, it's not going to give you 100 extra miles but you can tell a difference. I'm using this on a 2004 Toyota Highlander and will keep using it. Last 10,000 miles. Great stuff. Forever buying this product.

Well, it poured in my tank easily. Magic did not happen, did not feel more power or anything like what influencers say. So in reality, most people won't know if it's helpful or not. I assume it is helpful though, but I have no idea. Gas mileage is still the same. Again, no magic..

I think buying the 1.50 ones at dollar tree are just as good I notice nothing running better to I put one of them in my tank over two tank fills which I would think cleaned fuel injectors and things. So no I would not buy it again.