Fernando Alonso said he was pleased to put recent reliability woes behind him during the Brazilian Grand Prix but described his McLaren MP4-30 as "strange" to drive during segments of the race.
Alonso suffered mechanical gremlins in the United States and Mexico, while his track time in Brazil was restricted by a loss of power in second practice and qualifying.
However, Alonso was able to finish the race at Interlagos in 16th position.
"Finishing the race today was our first priority after having suffered retirements on recent Sunday afternoons, so it’s good news that both cars saw the chequered flag and we collected some good data, especially for next year and especially for the chassis, to see which is the best way to go to keep moving forward.," he said.
"The chassis has already improved a lot in terms of aerodynamics, and corner speed is good; but we are still missing power.
"Unfortunately, the car was not working 100% at the beginning of the race. It sometimes felt strange to drive, with different power in different gears, so I was having to try to avoid the odd gear from time to time.
"I think the reason for that was that after qualifying we fitted a brand-new engine and we didn’t have any laps in which to set it up."