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Message: <blockquote data-quote="InitialD" data-source="post: 4134950" data-attributes="member: 4678">---------- Post added at 10:18 AM ---------- 6 hour anti-bump limit - Previous post was at 09:59 AM ----------[/COLOR]That is not true. With each oil they use a new bearing. I've seen this test done with my own eyes b4 at the Texas Revolution Titanium Bearing Friction Test many years ago and they use a new bearing with every test.---------- Post added at 10:24 AM ---------- 6 hour anti-bump limit - Previous post was at 10:18 AM ----------To all newbies, the whole issue of synthetic versus mineral is not about which is better. It is whether or not it is OK to use synthetic in rotary.So in order to avoid any problems, most rotary owners in the past use mineral oil. Anyway many RX-8 owners in the United States have been using Royal Purple oil with good results and a few of them have gone over 100,000 miles b4 rebuilding their engines.Below is an FAQ from Royal Purple website.Mazda makes a statement in the Owner’s Manual not to use synthetic oils in a rotary engine, why do you say that it is OK?Royal Purple has performed seal compatibility testing on the components used in a rotary with excellent results — including older rotary engine seals ****** back to the Cosmo. Royal Purple’s Technical Services Manager David Canitz (who has been an owner and racer of rotary engine cars using synthetic motor oils since 1985 with excellent results) has been trying to find an answer to this Mazda statement for the last 18 years.In the early development of synthetic oils decades ago, there were purportedly some seal compatibility issues. Today’s synthetic oils do not have the compatibility issues of the old oils. There is no substantiated evidence of seal compatibility issues with Royal Purple.Here are some facts:- The Mazda Factory racing departments recommend and use ‘synthetic’ oils including the winning 1991 Leman’s 20-G 4 rotor Mazda 787B.- MazdaComp USA printed manual (now Mazdaspeed) recommends the use of synthetic oils for racing conditions.- Royal Purple Motor Oils have been used in rotary engines (both race and street) for 10+ years with excellent results.- Royal Purple Motor Oil is compatible with the bearing material, sealing elastomers and combustion seals used in a rotary engine.Source: http://www.royalpurple.com/faqs-rotary.html</blockquote>

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