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tjts1 · 03-02-2013, 12:39 AM

Get a colder thermostat than stock. Diesels are more efficient running cold. You just want enough heat for ignition. Colder intake air will be denser and cause a leaner mixture for a given amount of fuel.

03-02-2013, 12:39 AM	#5 (permalink)
tjts1 Banned Join Date: Feb 2008 Location: california Posts: 1,329 Thanks: 24 Thanked 161 Times in 107 Posts	Get a colder thermostat than stock. Diesels are more efficient running cold. You just want enough heat for ignition. Colder intake air will be denser and cause a leaner mixture for a given amount of fuel.