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03-early 07's love it! the cp3 pump and injector bodys were built to be lubed by the fuel. 90% of that lubrication came from the sulfur in the fuel. late in 07 the government mandated ulsf fuel be in the pumps, in early 08 i started seeing injector failures, sticking fca's in the cp3 etc 1oz:10gal added takes care of the issue.

and yes, useing it in late 07-new trucks can cause it to regen more often, put a programer on there, kill the emissions, add the oil, truck will be much more happy.


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