Coking can occur in 5 MINUTES!, never mind 1900 miles. One really hard run with no cool down and oil will be COOKING! in the turbo(s)...
I wouldn't want that oil to be a 5W30 dino...
That said, I'm not so sure coking is the problem it used to be...
With modern watercooled, ball-bearing turbos (which the Porsche may or may not have...) heat MAY? not be as intense in the turbo, thus coking MAY? not be a problem...
If the turbo(s) fail prematurely, the reason is probably pretty clear...
Only time will tell...
I wouldn't want that oil to be a 5W30 dino...
That said, I'm not so sure coking is the problem it used to be...
With modern watercooled, ball-bearing turbos (which the Porsche may or may not have...) heat MAY? not be as intense in the turbo, thus coking MAY? not be a problem...
If the turbo(s) fail prematurely, the reason is probably pretty clear...
Only time will tell...