The issue with synthetic oils in rotories is that they have a limited ability to burn off ash. Some synthetics have high ash-content and leave byproducts.

Mobil 1 and Redline are low in ash content. I have run Mobil 1 in both a 3rd gen TT and our stable of ITS 2nd gens - with awesome results. I have a compression graph to share with anyone who wants to see it - 2.5 seasons of 8500 RPM racing and she's like new internally.

AB

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Andy Bettencourt
06 ITS RX-7
FlatOut Motorsports
New England Region #188967
www.flatout-motorsports.com