Rotary engines aren't that eco-friendly considering that they burn oil injected to lubricate the apex seals. To curb this, Mazda mounted two catalytic convertors within the RX-7 with the twin-turbocharged 13B-REW.by means of vehicle throttle The 1st-technology RX-7 was introduced in March of 1978 with the intention of changing the out-of-date Savan