Update: My 2004 TC now has 349,000 miles. At 288,000. It was using a qt of oil every 500 miles now it uses a qt at 4,000. This van has another 100,000 Read more

Thanks a lot for explaining in detail how Cerma STM-3 works. I'm going to purchase & use one. My vehicle uses 5W-20 engine oil. Its engine has a Multi-Displacement Read more

Fuel Treatment from April 14th, 2015: Great stuff. My gas mileage definitely goes up steadily, as per my digital gauge, when I use this stuff. I absolutely Read more

I used Cerma STM-3 Engine Treatment in my 2002 Toyota Sienna Minivan; Fuel mileage went up from 260 mile per tank to 355 miles extremely happy with gas Read more

I purchased a 1996 Jeep Grand Cherokee with 196,000 miles on it. The transmission was beginning to act up after a couple of months driving the vehicle. Read more

Update: 4/23/15: Rocket fuel. Just wanted to say that I have now treated all three of our autos with the Engine, trans, and power steering treatments Read more

Hi John. I decided to try Cerma and my first use was in my daughter's 2002 Mazda Tribute with about 100,000 kms on it. It was running a bit rough and Read more

Reposted from http://www.amazon.com/Cerma-Gas-Ceramic-Engine-Treatment/dp/B00AZONLUC/ By Brad on February 25, 2015

This is the best stuff I've ever Read more

Cerma makes everything run smoother. I was skeptical of Cerma at first, but decided to try it. For example, my wife owns a 2000 Jeep Wrangler. When Read more

Cerma Gun Lube. I followed the instructions as directed. I shot a 30 round magazine as fast as I could pull the trigger out of my AR-15. After shooting Read more

My name is ECS, i was introduced to your product by a friend. I spoke with John your technical analyst and asked him if this would be a good product for Read more

We drive a 2005 Ford Escape that we leased new. The sticker for mileage said 19 city 22 hwy and we got an average of 20.5. We tried the cerma with stm3 Read more

At first I thought this was another slick50 type product but after checking out the website and finding no bad reviews I said what the heck let me try Read more

This product saved me from loosing the use of my furnace for a week in December, I was leaving my home in north IA. I heard a strange noise from the basement Read more

6/5/15: I wanted to let you know my 1997 Toyota is running like a top since I started using your products. I am ready to change to Cerma Oil and am looking Read more

Unbelievable MPG increase!! My new 2015 subaru outback 3000 miles had 27.4 miles per gallon. I added this to the oil chamber under the hood, reved the Read more

6/3/2015: John, I have been using the Cerma Evo grade oil in my 2012 Prius for over a year now an was thrilled to get 53-54 miles to the gallon. Recently, Read more

I have gone through 1000 miles of engine treatment+Transmission fluid change followed by 4000 miles of Cerma oil ->Filter change -> then another 1000 miles. Read more

Engine Treatment: Added CERMA and gas mileage has increased and harmonics are much better. Love to drive my car more than ever. Bought a car with over Read more

In my application, 1991 BMW 750i 5.0L 12 cylinder, I was mainly trying to correct annoying hydraulic lifter noise without having to replace any lifters. Read more

Just treated my 2007 Toyota Avalon with the Cerma Engine Treatment and the Cerma Transmission. Car is running smoooooth (the vibrating is down to almost Read more

Hullo John,
I bought 1 bottle of Cerma STM-3 Engine Treatment and 1 bottle of Cerma STM-3 Automatic Transmission Treatment from you in May 2008. I treated Read more

I treated my 1998 Dodge Diesel Pickup with 6 oz Cerma Engine| Treatment and the engine smoothed up and has much more power. I am very satisfied with this. Read more

I have been using Mobil 1, Shell Helix, Castrol Edge, and now Cerma (Cerma is the best motor oil I have ever used) At first I thought it was my engines Read more

O ahhhhhhh mazing :) At first glance, i thought the price was a little crazy.but some in-the-know car guys that i know convinced me to give it a try, Read more

Dear Cerma, I started using your products in the summer of 2013. I travel all over the country in my 1991 Dodge D250 two wheel drive with a 5.9 L Cummins Read more