Dr S. G. J. : Herts, used ZX1 in his BMW and 2 Harley Davidson Motorcycles

"Having used your ZX1 products now since early this year I felt I had to write to congratulate you on the performance of these products which have exceeded my expectations.... Since putting ZX1 Extralube in my BMW 325i the engine performance has noticeably improved with very prompt starting and smoother running. The most noticeable effect has been with petrol consumption, increasing from approximately 240 miles per tank to consistently over 300 miles per tank of urban driving."