To: Jim Miller, Centurion Lubricants

Dear Jim,

I've been meaning to write this letter for a long time. As I've told you before, OptiLube is a great product.

My '99 Ford Powerstroke was on an oil consumption test with Ford, but because it didn't use more than a quart per 1,000 miles, they would do nothing (it averaged a quart every 1500 miles). I then started to use your product at approximately 22,000 miles. The engine was so quiet afterwards I thought that it had stopped halfway home.

What really impressed me was the fuel mileage, which went up 10 to 15%. The oil use also stopped.

I also use your fuel additive which increased my mileage about 10%. I noticed this the most when I ran out and made a 1200 mile trip across country. My mileage dropped 3-4 mpg without your additive.

I now use OptiLube in all my trucks- gas and diesel. I only wish you made a gas additive to help my mileage on the gas engines.

Thanks,

Cary E. C.