I got this along with another product to clean out my 14 year old Pontiac, to try to improve power and efficiency. I already get decent efficiency and power from my car and after using this there was an increase in power but I am not sure about efficiency. This is a good product, however, and I would recommend it! I did not receive anything for this review. If this review was helpful in determining what product to buy for you, please give me a "thumbs up". Thanks and have a great day!

The speedometer/odometer and gas gauge on my car stopped working around 180,000 miles. The "check engine" light was on with error code P0500 - meaning something wrong with the speed sensor. I bought a new speed sensor online and had it installed by a mechanic. It didn't fix the problem. A local speedometer repair shop checked the instrument cluster and said nothing wrong with the instrument cluster. I then took my car to a local reputable repair shop. I had to leave the car there for 2 days. They said they performed a lot of diagnostic, but couldn't find the problem. My last resort would be the dealer but I was hesitate to speed a lot of money on it. It's legal to drive with a non-working speedometer/odometer. I just need to disclose the fact the odometer is not accurate if I am going to sell the car.

I was almost settled on the non-working speedometer/odometer and gas gauge. At the same time, I found my car lost its power. I searched amazon and found this cleaner and Sea Foam sf-16 Motor Treatment, 16 oz.. I started using this cleaner and the Sea Foam motor treatment. I could feel it reclaimed my car's lost power. After about 15 bottles of each, my speedometer/odometer and gas gauge started working again! I was so happy to see it after one year's struggle!

The speedometer/odometer and gas gauge on my car stopped working around 180,000 miles. The "check engine" light was on with error code P0500 - meaning something wrong with the speed sensor. I bought a new speed sensor online and had it installed by a mechanic. It didn't fix the problem. A local speedometer repair shop checked the instrument cluster and said nothing wrong with the instrument cluster. I then took my car to a local reputable repair shop. I had to leave the car there for 2 days. They said they performed a lot of diagnostic, but couldn't find the problem. My last resort would be the dealer but I was hesitate to speed a lot of money on it. It's legal to drive with a non-working speedometer/odometer. I just need to disclose the fact the odometer is not accurate if I am going to sell the car.

I was almost settled on the non-working speedometer/odometer and gas gauge. At the same time, I found my car lost its power. I searched amazon and found this cleaner and Sea Foam sf-16 Motor Treatment, 16 oz.. I started using this cleaner and the Sea Foam motor treatment. I could feel it reclaimed my car's lost power. After about 15 bottles of each, my speedometer/odometer and gas gauge started working again! I was so happy to see it after one year's struggle!

I have a Mazda Miata with 50,000 miles on it. I use premium GAS, I noticed the engine is not as smooth as I would like it . so read some of the reviews here and decided to use Techron anyway even if I use premium gas. after the first bottle, I already notice a smoother engine, I plan to use another one before I take it for an oil change

Fuel gauge in GMC Envoy stopped working. Followed the directions and dumped it into a fresh tank of gas when I filled up. After about a week the fuel gauge started working again. Seems to do what it claims. Thanks!!