not a big deal really. its in a 00' golf 1.8T with a boost cont. running approximately 10psi rather than the stock average of 5psi. (peak is about 11 psi) so far after about 1500 hard miles (and very hot too as well as alot of idling with air on.) I have had NO oil consumption. Almost every other oil (synthetic) ive used in this engine has had some amount of consumption but, not GC green and looks like the gold too. M1 5w-40 had 0 consumption after 5K miles and so did Kendall syn 5w-40. I say 0 consump. they both did have a little bit prolly around 1/8 a quart at most. To me thats negligible. Green GC has never had any consumption and so so good witht he gold. also, Im running this sample to between 5-6K miles before draining and then sending the last sample of green GC along witht he Gold GC sample. Results at the same time!!!