[rdass623]

30 interval for plugs seems frequent to me. the bosch on an old car with breaker points, yes but with a modern electronic ignition, it seems to be waaaay premature. i would feel much better with a mechanic who would read the plugs rather than just replace them. from what i have seen the frequency of alot of porsche's maintenance is premature..... except for the oil change intervals. it is my honest belief the maintenance schedule is to keep owners coming back to the dealerships to hook them on the sale of a new car. good marketing to set the hook on a new sale, but maybe not so good for the consumer.