I own a 2002 Mack semi. My truck started using 2 to 3 gallons of oil per week. I was told I needed to rebuild the motor, rings, sleeves, rod, and main Read more

Works. 'Lil spendy but damn worked. Bought In april 2014 used in my '04 6.0 F350 4x4 an put some in my dad's dodge '05 3500 5.9 he even commented + on Read more

Did a test session earlier, the initial run since adding the CERMAX 5W40 oil plus the manual transmission treatment.

First thing I noticed when shifting 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

Thank you Cerma! The day I put Cerma in my engine it smoothed out my choppy idle at 800rpm. And even today it is still getting 5.5mpg to 6.0 mpg driving Read more

I added the Cerma to the engine (7.3L IH diesel) and power steering box but not yet to the rest of the drive train. When I first put my foot on the gas, 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

I never bother writing reviews, however, this product is FANTASTIC!! 560 SEC Benz with 113k miles, about 30k since valves...UNBELIEVABLE!! Cold start Read more

Thank you John,
It was a pleasure speaking to you on behalf of your additives.I was amazed and I'm still smiling and overwhelmed with its results. Sir 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

Just received the engine treatment and it works perfectly :)

My car has more torque, sounds great it's also smoother running.
My vtec kicks @ 6k and Read more

I'm only 2 days into the treatment with 22k miles on the odo only 100 miles driven since treated and already noticing a big difference when driving it Read more

CERMA is the real deal! If you follow the instructions after applying product to your oil, you will notice less noise, better fuel economy, about 1.5 Read more

Update from NZ on Cerma: Hello, December last year I purchased several products from you. I changed my oil ran the vehicle for a while the added Cerma. Read more

I was a skeptic, but when I added the Cerma Engine Oil Treatment to my Yanmar, the change was amazing! Within 20 minutes the engine smoothed out, became Read more

The best. Powered up my 12 year old truck -- it feels like new. I have a Ford F250, 2003 with 200,000.00 miles and in good shape, but after I used this Read more

Dear John: I had an appointment with Acura concerning an alignment. My 2000 Acura TL has 302,000.00 miles. As you remember from our phone conversation 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

When I first went to use this product, I was a bit skeptical, I had an issue with my truck starting. I had tried every chemical to run through the gas Read more

Dear Cerma, I have attached a photo of the average MPG on the 2008 Cadillac Escalade which was treated at 183,743 Miles. At 183,901 miles, MPG average 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

What the ......, this stuff actually works!
Here's the story...1990 Mitsubishi Montero that I bought new. First it was the unofficial Cheerleading Team 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

So...I just got the oil changed to Cerma 5W30 and could feel a huge difference just starting the car up. Engine vibration in the pedal has gone almost Read more

Hello Jim,

I would like to thank you for introducing me to Cerma and to such a quality product.

I am a certified Automotive Service Excellence  Read more

I recently stopped in at my local gas station to fill up like I do twice a week when I met the attendant (Ken Briscoe). We got to talking passing time Read more