1.4Tdci Grey/blue Smoke

[lipso]

Have 2004 1.4tdci with 130000 miles - goes well, idles normally but uses a lot of oil if driven by accelerating fairly sharp through the gears. If driven nice n easy uses not too much oil. On starting some grey/blue smoke from exhaust and if accelerate hard in 2nd,3rd also some grey/blue smoke comes out of exhaust.

I'm thinking its the valve oil seals rather than piston ring wear? Apart from renewing these seals anyone know if theres another way of reducing oil usage.Needs regularly topped up with about 5 litres over 6000 miles - How much would renewal of valve oil seals cost in a garage? .