Romain Grosjean and Pas-tor Maldonado had a Cana-dian Grand Prix to forget as the Enstone-based Lotus duo finished out of the points in Montreal on Sunday.
Grosjean was forced to retire on lap 21, following rear wing damage, while his teammate suffered a problem with his car’s power unit and retired on lap 59.
Caterham, who are based at Leafield also suffered a pair of retirements, Marcus Ericsson exiting on lap seven and Kamui Kobayashi on lap 23.
The race was won by Red Bull’s Daniel Ricciardo.
“Today was not great in terms of pace,” said Grosjean.
“However there are some positives looking forward.
“We can see that a Renault Sport F1 team can win a race so we have a target there, especially when the win came at a circuit that is not thought to be one of the stronger ones for them.”
He added: “The rear wing of my car broke, so it was safer to retire than risk a potentially dangerous situation.
“We have a lot of work to do, so it’s time to try to understand our problems and come back stronger.”
Maldonado said: “It’s a shame as the race was going very well, and we had an excellent pace – to be honest I was quite surprised by the car. The strategy was good.”
Meanwhile, Chipping Norton’s Sean Walkinshaw finished seventh and 12th as he scored his first points of the season in round three and four of the EuroFormula Open in Portugal.