Morning all with sore heads

I have looked on all the other related threads and from what I see/hear pretty bloody pointless?

This is a adjustable one from eBay I reckon.. I didn't buy it, came on the car when I bought it a year ago :L

As engine is just standard.. and from what I have read it won't be doing any favours for me at all?

If anything it's just pressuring too much fuel through to the injectors?

I also do have the standard one here somewhere :L

Would this partly be the cause of excessive fuel use?

Any help, corrections and info would be muchly appreciated.... Thanks, Jake.

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A red rallye in progress!