Torsion value


New Member
Hi guys new around here.
For the past year been having mpg problems with my leon fr170 bmn and i have cleaned sensors maf and map car runs better but mpg still rubbish £20 to 100 miles 60/70 mph motorway driving.
I have been to 4 garage and when i mentioned torsion value they looked at me like i just walked off a ufo and didn't know what i was on about.
I rang volkswagon local to me as they specialists but they didn't have a clue either.
I have no hope lol
Where do i go from here my letres per hour is .36 not sure on the rest until i can get hold of vcds.
Any help is appreciated