Renault Sport F1's Remi Taffin believes teams will be "right on the limit" of the 100kg fuel allowance in the Singapore Grand Prix.

So far there has been little sign of drastic fuel saving during 2014 following the reduction in the maximum amount of fuel permitted for a race. However, despite the impressive efficiency of this year's cars, Taffin explained that the nature of the Singapore street circuit leads to high levels of fuel consumption which could prove an issue on Sunday.

"Singapore stands in stark contrast to the high speed tracks we have just visited," Taffin said. "It has 23 corners, the highest number of any track on the calendar, with several hard braking points over the lap. These factors combine to bring the average speed down to around 170kph, with just 45% of the lap spent at wide open throttle.

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"The ICE and turbo are therefore given an easy time here. The Energy Store and MGU-K, however, are really put through their paces. Each braking event is long and hard, particularly around the 'hotel' section through the grandstands, where the K will be able to recover enough energy to keep the battery at a relatively high level of charge throughout the lap. In contrast, the MGU-H is used a little less as the short straights between the corners do not really offer ample time for the exhaust to develop a steady flow.

"These short bursts of power naturally require good torque response and driveability but they also bring fuel consumption well up. In fact we will use the largest amount of fuel per lap over the season here and we will be right on the limit of the 100kg permitted. To put this in context, last year we used 150kg of fuel - over 30% more. Here, more than anywhere else, shows the advances we have made in efficiency.

"Singapore should suit the Renault Energy F1-2014 far more than the previous two tracks. We've made good progress in energy recovery and management and these two elements are key to success here. We know the competition will still have an edge, but we expect to be closer here than we were at Monza. Getting a good position in qualifying, which should be possible, will set the tone for the race so the focus will be to maximize the one-lap pace and start as far forward as possible."