"Of course, fuel costs are
"Of course, fuel costs are not the only important consideration when comparing a diesel truck to a gasoline-powered truck. Towing capacity is also important. For a comparison of the towing capability of the Tacoma vs. the Colorado and Canyon, please see our prior story. We will give you this hint. The difference is not as big as you might guess."
So when you're hauling 4,000 lbs in the Tacoma, and the automatic transmission is shifting like crazy to find the right gear and the engine is wailing, well that be a problem for the author of this article. Oh yes, plus the gas mileage for the Tacoma will drop drastically while towing. But these points don't appear to be a factor in this story.
The torgue of the Colorado diesel will easily tow 4,000 lbs without the wailing engine and beaten transmission. Plus the gas mileage will be far higher than the Tacoma.