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On 8 Dec 2004 at 10:29, Petri O. Calderon Larjanko wrote: > I read somewhere that for newer engines an additive is not necessary, > but on an original (possibly tired) engine you may need it to prevent > the heads and valves to die prematurely. This rumor was rampant here for years, but I think it's pretty much been laid to rest. Unless your Aussie VWs were made with different parts than the German VWs, your engines, tired or not, don't benefit from valve lubricating gasoline additives. Keep in mind that there are likely to be many aftermarket additives available. Some may have lead while some won't. In the US, I believe that lead isn't allowed in additives. Valve lubricating additives ARE probably necessary if you drive a car with cast iron heads where the valve seats and guides are machined right out of the cast iron head material. A lot of classic cars here get the heads machined to convert them to bronze guides and hardened seat inserts; this makes them completely compatable with unleaded gas. Older cars with the original cast iron heads still seem to do fine if they are only driven occasionally. -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~