Well I have been using a 10/60 for long time as recommended by Bob Rawle, but wonder about changinf to a 5/40. Any thoughts?
Many thanks for any input.

:SUBARMAN:
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Toyobaru 86 with Cosworth exhaust brakes and supercharger, Cosworth mapping, Eibach lowering springs, OZ alloys, fast road geo and various cosmetics. Great fun!