Pathetic Service

People, please think twice before buying an Opel the after service is pathetic..... I bought a Opel Astra 1.4 enjoy on 55 000km they replaced the Turbo, Catalytic converter, piston, bearing and connecting rod... ever since that we had a problem with our vehicle using oil and leaking oil.... I mean 6000km after the 90 000km sevice i needed to pour in 2lt of oil and my vehicle only has 97 000km.... The feedback i got was that they want to perform oil tests over 3000km on my expense... i need to go back after each 1000km that i drove.... and i also need to do that before April next year when my warranty expires..... personally i feel that Opel is playing for time to not do any repairs i will never ever buy an opel again nor advise any person to buy one we also have a Opel Corsa with almost the same KM's and it is not using oil