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Dear Sir
I am writing to say how pleased I am with the purchase of your Extralube ZX1 and I have noticed a big difference in my petrol consumption on the motorway run. It has gone from approximately 32 MPG to 38MPG at 70 MPG and I have put it in the engine to see if it does the same job as with the petrol.
I would recommend it to anybody.
Yours sincerely
C Blacklor.