hi all. i have a 2004 2.0 hdi 90bhp with 90k. is it turboed or not. the book says it should be doing 57 mpg but i,m getting on average 35 mpg( 400-450 miles on a full tank). the revs drop down slowly and it feels a bit sluggish but there isnt any thrust in power when i put my foot down. it doesnt blow any black or grey smoke unless you really thrash it at 4-5000 revs but thats normal for a diesel i presume. anyway back to the question....is it turbo charged and if so would a knackered turbo affect fuel consumption dramatically??