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I've used these before to good effect so purchased some of their latest stuff to see if it's any good.

The nice gentlemen sent me some free samples too. Has anyone else tried the latest fuel system cleaners?



 

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PS I should add that its a good quick fix if your emissions are too high for the MOT as it did bring the emission readings down however I didnt see any great benefit in terms of improved fuel economy and overall performance.
 

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Best one i've used is 10k boost. Used to sell it in Halfrauds. It's not that cheap but it did make a really noticeable difference on my old Fiat 20VT. The main problem i found was spraying it into the plenum downstream of the MAF sensor (just awkward). It coughed a few times then a load of grot came out the back, it was then noticeably better, more responsive.
 

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I'm not convinced of the benefits of this kind of thing.

I recently was given a few cans of Tunap fuel additive to try. Put a can of Tunap 983 diesel additive into my GT on a full tank nd watched the mpg drop by 8!

Might be coincidental with something else going wrong but doesn't inspire me...
 
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