Hi guys. I have 07 xt manual with 45k on a clock. Couple of days ago, going back home my xt while presing gas started makeing "wizling" sound and loseing power. Next day symptoms stoped but come back again, after a wile "wizling" sound stoped but i lost 40% of power and i could not hear turbo working. Dealer after checking things out said that my turbo is ok but downpipe is clogged and i need new one. Mechanic after i asked him how was it possible said that it was from bad fuel. I can hardly belive it, im ALWAYS on premium fuel and car has only 45k. Is it really possible or there is some ather reason for it ? Thanks.