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Discussion Starter · #1 ·
I have a 2003 2l 307 HDI , 120k .
Does anyone know if there are any harmful effects done to a diesel engine, or other car parts, when an additive (such as Millers Sport 4 ) is used occasionally ? According to the reviews, the product seems to produce a lot of positive results. Has anyone used this product or a similar product ?
 
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This is open to much debate. The official line from PSA is not to use additives in the common rail engines, yet many dealers do so.

In my view unless the fuel system has beconme contaminated there's little benefit on a proiperly driven diesel engine.
 
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