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Fuel additive... yay or nay?

Robertb

Well-known member
Joined
1 Sep 2003
Messages
8,406
So, got some STP Complete Fuel System Cleaner free with Evo mag subscription.

Does it do any good, or any reason why I shouldn't give it a go in my '04 X5 3 litre petrol?
 
Probably do no harm if they gave it away. Questionable if it does much good over and above the detergents and additives in modern fuel.
 

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