Engine/Car: skyline r33 gtst rb25det
Type of failure: loss of oil to head, head scourged. (oil galeries were blocked)
Factors influencing the failure: hard constant driving. dirty oil inside motor (needed a service)
State of tune of the engine: factory engine with 3.5" exhaust, factory boost
Suspension and tyres: factory. R34 GTT rims (235 wide tyres)
Oil used and service interval: not sure, happened before i got to change the oil.
General comments: could still drive car but ran very poorly and had a loud ticking from the head due to blocked oil galeries.