My Porsche tech, one of the very best 928 mechanics in the country, and owner of Euro Motorwerks here in Indianapolis, informed me that all Porsche service centers nationwide received a memo about three to four months ago, with updated timing belt/water pump service interval information. The memo stated that the timing belt/water pump service interval for the 928 has been upgraded to 45,000 miles or 10 years, whichever comes first, vs. the previously established 45,000 miles or 5 years, whichever comes first standard. This should come as good news to those considering themselves to be on the previous borderline of 5 years. Now of course, this could be a conspiracy by Porsche to rid the roads of 928's forever, but I highly doubt it.
I posted this same thread on Rennlist when I first found out, as I thought it would be considered good news to all 928 owners, but somehow it got turned into something negative, as would be expected over there.
I, of course, do not have a copy of the memo, but a simple call to an authorized Porsche service center asking them to verify such existence of this update should be done if you think your 928 might apply to this new update. If this is true, which my tech would certainly have no reason to lie, should be considered great news, considering the price of a full timing belt/water pump service complete with tensioners etc. is quite pricey, to put it mildly!
Low Miler