Daniel Ricciardo says Red Bull expected it would only complete limited mileage on the opening day of practice for the Spanish Grand Prix.
Ricciardo suffered his third power unit failure in just four races after a spectacular explosion as he crossed the finish line at the last round in Bahrain.
He encountered further issues on the opening morning of running at the Circuit de Catalunya and was forced onto a fourth engine.
The Australian missed the majority of the afternoon session as a result, managing just four laps on route to 13th on the timesheets.
“We expected we would be limited with mileage today, and we also knew that we would have to use the fourth engine for FP2,” he said.
“It would’ve been nice to get some more laps in but we did enough to give us plenty of data to look at. Dany [Kvyat] had a cleaner session and we’ll also look at his data and try to learn a few things for tomorrow.
“There’s a lot of potential with the upgrades and tomorrow’s qualifying is what counts.”
Team-mate Kvyat, who sampled the new short-stub nose on the RB11, ended the day fifth on the timesheets.
“We had a good run in FP2 and there is a lot of data for the team to analyse to find improvements,” said the Russian.
“We have some upgrades here and we’ve been looking closely at how they work. We’ll try to extract the maximum out of the car so we can make the most out of qualifying tomorrow.”
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