Saracens maintained their unbeaten start to the season and took a stranglehold on Pool 1 of the Champions Cup with an emphatic 45-10 bonus-point win over tournament newcomers Oyonnax.
There were tries for Alex Goode, Chris Wyles, Maro Itoje, Richard Wigglesworth and Schalk Brits, plus a penalty try and 13 points from the boot of Owen Farrell as the visitors eased to the victory.
Oyonnax's points came courtesy of a late try for replacement Arthur Aziza, a conversion from Regis Lespinas, and a penalty from Rory Clegg.
Saracens knew backing up their strong start with another win would put them in firm control of the pool at the half-way stage.
The English champions had only won three of their 10 Champions Cup pool games in France, but they had been victorious in the last two and they proved far too strong for a side sitting bottom of the French Top 14 table.
England international Owen Farrell made no mistake with his second penalty attempt as Saracens strength up front was again felt by their hosts.
The first try should have followed in the 17th minute. Farrell's drifting line fed Wyles into a gap and the American fed Chris Ashton on the outside, only for Silvere Tian to get back and make a crucial intervention.
But it proved a brief reprieve for the home side as from the resulting scrum Saracen got a nudge on and when Oyonnax scrum-half Fabien Cibray strayed offside to kick the ball away referee Marius Mitrea headed under the posts for a penalty try, converted by Farrell. Having stuttered through the middle part of the half, Saracens finished it with two superb scores.
Oyonnax started the second half on the front foot, knowing an early score was crucial to give them any hope of an unlikely comeback.
But Saracens killed them off with two quickfire scores, the first coming as Marcelo Bosch's long pass found the overlap and Michael Rhodes sent Itoje cantering over for the crucial fourth try. Replacement Aziza got a late consolation for the hosts but Saracens had the last word through Brits.