New engine was imported from Japan and had done 128,000km. But I guess there is no real way of telling. Put Mobile 98 in it last night. Before that 98 bp Ultimate. No boostcontroller. Was hitting 1 bar which was guessing 14.5psi with previous motor. New engine didn't seem to spike so high. Guy I got engine from said the computer must be chipped or modded to cause failure so soon. I was giving it some right foot action out the back roads but not to redline. 6-6,500rpm top. Thought it should be able to handle that ok. Was going quick but nothing over the top.