I built my gt35 engine I used the car for work ,Santa pod,quite alot of track days .I ran mostly 2.5bar boost and 100+shot of NOS and the only reason I have had to rebuild it is I buzzed the engine on track I had done 31k on this engine the only problems I had were an oil pump drive fail at 10 k but I caught it straight away and an alternator fail.I put the engine logevety down to a 7.5ltr sump and oil changes at 3k religiously.I am currently building a bigger power engine as I was so impressed with my last one.I can say I was a bit anal whilst building my first engine so that may have helped