Ethos Environmental President Joshua Higginbotham, right, and associate Paul Rangel are implementing a new distribution network for the company’s oil and fuel additives.

Ethos Environmental President Joshua Higginbotham, right, and associate Paul Rangel are implementing a new distribution network for the company’s oil and fuel additives. Photo by Melissa Jacobs.

The Cash for Clunkers program may have reached the end of the road, but Ethos Environmental is test-driving a new business model to sell more of its oil and fuel additives and arrive at the same goal: increase gas mileage while reducing emissions...

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