It sure did, intake temps went through the roof on Roo16 compared to E85 when I was running my smaller cooler. Motor was a lot happier and made more power easier on E85.. Didn't realise Spiro was running E85 when he was making 800rwkw, always thought he was using C16.. Think I will stick to E85 now and not waste anymore money on Roo16/C16... Cheers Ben Ben