Customer Ratings & Reviews

Another great product keeping my car running smooth through all kinds of driving.

With my older Yukon this sure helps the old gal

Just started using in my 2015 F-150 Lariat SuperCrew's 3.5L Ecoboost.

Seems to do the job

I will buy it again…

One of the only things I can STILL Afford that’s left on line here At AMSOIL. So I would Say if you like this Stuff BUY IT NOW!!! I’am gonna POP For one more 12 PAK Next Pay Day B4 They raise the price AGAIN??!! Sorry Guy’s, It’s just getting outta Control here and harder to Afford. But I do like this Stuff and Recommend it highly. I don’t know if it’s doing anything but I use it all the Time usually every Tank or every other Tank of Fuel.

I have never used this product, in the past, nor currently as of yet. However, I do believe, that any product that is manufactured by Amsoil, based on my past experience with them, will prove to be of extremely high quality!

Only use Amsoil products.

High quality product and does what it’s designed to do

Not sure if it works but I'm not sure it doesn't

I generally see a half to 1 mile per gallon improvement in fuel economy when using this. I put it in when my fuel economy starts to drop under normal driving and seems to bring it right back up. Probably don’t use it as open as I should but I use it based on when my fuel economy starts to drop off. Works great.

I suspect this product is as good as all the other Amsoil products I have used. My first time trying this additive.

I drive a 2019 Sierra 6.2 l and I like how it runs but after adding the Upper Cylinder Lubricant it is so much more smoother and the throttle is not responsive. Great product.

increase my gas mileage about 2 mpg

Great as product, should be cheaper if have to be used as many times as recommended

Best product out there to clean lube the upper cylinders as it improves the engine performance with out doubt.”

I like old cars. I have three, and their respective ages are 15, 23, and 35 years old. One way I keep them running is through the regular use of fuel-additives. Amsoil's Upper Cylinder Lubricant helps clean out the fuel injectors and lubricate the combustion chambers of the engine where the engine oil can't get to. The UCL also helps clean the fuel injectors; if they aren't clean, your gas milage will be poor and you may get rough running. This product helps prevent that from happening.

Definitely better than any other lubricant I've used. Helps with the injector tick on my Mustang GT

I know filling up my tank at the pump is already expensive, but I use Amsoil Upper Cylinder Lubricant at every fill up in all my vehicles. I like the fact that it helps reduce issues associated with Ethanol in gasoline and keeps the upper cylinders lubricated.

Great product to regularly use to make sure fuel system is clean and lubed. Cheap insurance