Engine performance is very good, even under speeding it up on 100 km/hr, I have’t heard any buzzy sound. The pick up of access is ultimate.In we speak about its fuel economy then it gives an average of 40-45 km/l. Its gives more when you are on a long route, say of 200-250 km, as I have noticed during a regular drive from delhi to agra and then to aligarh route. Gear box is making a noise when you have covered around 12000-15000 km, but its normal as told me by the engine mechanic of suzuki. I am owning a access and its running on its 23k milestone now.