Back in the day it was every 1,000 miles or thirty days, same as the warranty ;)
mike
>> Most major automakers agree: The adage that you should change your car's
>> oil every 3,000 miles is outdated, and even 5,000 miles may be too often,
>> The Associated Press reported.
>>
>> Ford Motor Co. became the latest manufacturer to extend its oil life
>> guidelines, making public that it is raising the recommended oil change
>> interval from 5,000 miles to 7,500 miles on its newly redesigned 2007
>> models and all subsequent redesigned or new models, AP said.
>>
>> The company, like many other manufacturers, said last week that higher
>> oil quality standards and new engine designs were responsible for the
>> change, which affects vehicles driven under normal conditions. L&MT >
> I'm going to date myself, but before there were speedy oil changes and syn
> oil the interval was 5,000+.
>