Do I really need to have a fuel system clean every six months?

Nissan have advised me that they recommend a fuel system clean every six months and will carry one out automatically when they service my car, unless I request otherwise when I book the service. Is such a clean really required and if so, how often?
The garage is probably a member of The Good Garage Scheme, sponsored by a lubricant and cleaning agent supplier and that's why this is "recommended". Whether or not it is necessary depends on how the car is regularly used. If it does lots of short runs, then it's probably necessary. Mostly long runs, probably not.
Answered by Honest John on

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