Anyone have experience with Denso Iriduim TT, is it better than Denso Iridium longlife in 4runner or any Toyota vehicle in general? This person says they go bad after 60k miles, he bought it from Rockauto so it is not fake. When I spoke with Denso customer service, they told me Denso Iridium TT is better than longlife even though Iridium TT is cheaper than longlife. OEM for 4runner is longlife.