Mazda RX-8 Lines, Fittings & Accessories, 2004-2008The Mazda RX8 has a high winding rotary engine capable of easy reaching 9,000RPMs on a daily basis. With those revs comes very high oil temperatures. Most RX8 models with manual transmissions were outfitted with dual oil coolers from the factory to keep the rotary engine's oil at a safe temperature during high speed driving and track situations. Unfortunately, over time, the stock rubber oil lines and steel fittings can severely corrode and degrade