"We have a customer who has a 1995 Chev 1 ton pick up with a 45 big block. He uses it for off roading. He has been complaining about low torque, not enough power. He thought the engine was too heavy and he was going to replace it. We put two small bottles of Eco-Tek in has 5L of synrhetic oil and his problem was solved. He came in the next day extremely excited to tell me he had plenty of power now. I have also noticed a tremendous increase in low end torque with my pick up and amazingly have documented an 11.2% fuel efficiency increase.