So the definitive (ultimate) oil thread isn't very definitive at all. I am due an oil change stage 1 2008 S3 and reading mixed reports online about people switching to 5w40, some have even said there car was burning less oil using this. I am burning about 1L every 5k so far from dire straits. Anyone here using 5w40 ? Also i don't have my manual to hand, what spec does our car need ? 504 .00 ? 507.00? or something else. All input appreciated.