With a vast array of different engine treatments on the market, it is difficult to know what is worth using, and what is not. Many people have heard the horror stories about sub standard engine treatments ruining engines by clogging oil galleries, filters or causing the bores to glaze, or any number of other problems, Some of these stories are true.
None of them are about Extralube ZX1 Micro Oil Metal Treatment.
Extralube ZX1 Micro Oil Metal Treatment is different to the other engine treatments available. Extralube ZX1 contains absolutely no Teflon or PTFE (a common cause of the problems referred to above.) Extralube ZX1 does not alter the characteristics of the oil (or other lubricant) but chemically bonds to the metal surfaces and modifies the friction properties of the metal. This modification allows the oil to do its job even better and the results in drastically reduced friction and wear.
check out this link to read what Halfords customers say about ZX1 http://reviews.halfords.com/4028/793976/reviews.htm