My 2004.5 S40 T5 only has 2,000 miles, but I'm wondering about using synthetic oil when I get to the 7,500 mile service. Also wondering about changing oil more frequently. My Volvo service rep says it makes no difference whether I use synthetic oil or not. Volvo's on-line tech service recommends synthetic oil for severe loads or conditions. Both say I should stick to 7,500 mile intervals. I have heard good things about synthetic oil and I am willing to spend the extra $$ if it improves performance or extends the service life of the engine. I have also heard from turbo owners that more frequent oil changes are a good idea. Has anyone done research or heard from experts on these questions? By the way, the car is awesome. Thanks for any help.
alderaan
alderaan