Upper Cylinder Lubricant & Fuel Injector Cleaner (UCL) | 5.25 oz., 12-Pack

This stuff is basically the exact same as Lucas UCL which I've used for years. The only difference is this is almost half the price. Just know going in, that this is intended to prevent a fuel system failure, not clean or " fix" an already damaged fuel system. Personally to me the 2 main benefits of occasionally using this is most importantly at #1- keeping the fuel pump lubricated which can prevent an expensive failure of an overheated pump, and #2- a slight increase in gas milage due to keeping things clean and lubricated. Very worth it to me, especially compared to the competition's price and the consequences of a fouled injector or burnt up fuel pump.

Sediment in the bottom of the bottle

Great quality product, it works for my car.

Time will tell

Dura Lube is the real deal. I've used their products since 1998, and have seen the products perform in a ton of different applications flawlessly. I've even seen a motor with a fresh oil change develop a hole in the new oil filter and be driven back to my shop from 38 miles away with the oil light on the whole way. The engine was not hot and only had a slight chatter when it arrived. A fresh oil change and the car is still running almost 10 yrs later (and that's a miracle since it's a ford v6).

I thought I'd try this instead of Amazoil for the price savings..I got worse mileage 36 miles less on a tank .I bought 2 bottles and as soon as I went back to Amazoil my mpg went up ..Not effective and each bottle look different in color

sputters now.

It quieted down my engine (although this wasn't very noticeable... I have a Lexus and it was already quiet). But, I was dealing with a rough idle. I cleaned my MAF and that helped, then I added this to a fresh tank and it helped some more. It also lowered my idle. I'm now down to about 525 rpm at operating temperature. In general, I like what it has done.