The Maruti WagonR CNG variant has become a popular choice as an eco friendlier and cost effective version of the petrol model. The initial cost is higher, but many buyers are drawn to the promise of lower running costs and lower emissions. But there are debates about whether, in the long term, the CNG variant actually delivers on these promises. Some users report fuel costs savings of up to 65 percent, while others complain about loss of performance and increased maintenance costs. The ownership experience may also be dependent on how many and how readily available CNG filling stations are in the region. Also, concern exists with regards to the effect that CNG conversion has on the longevity and resale value of the car. As a result, talks have broken out between potential buyers and current owners over whether to go for the CNG variant or just stick to the traditional petrol model for the longer term.