Christian Horner has backed away from previous demands that the International Automobile Federation (FIA) should change the rules to reel in Mercedes, with the Red Bull team principal conceding equalisation is "probably not" right.
After reigning constructors' champions Mercedes continued their domination from 2014 with a one-two finish at the Australian Grand Prix earlier this month, Horner was outspoken in his concern that Lewis Hamilton and Nico Rosberg's ongoing success would hurt F1.
The Briton, who oversaw four consecutive constructors' titles for Red Bull from 2010-13 alongside Sebastian Vettel's four drivers' championships, claimed after the Australian GP that the FIA had previously attempted to keep his team on a tight rein.
But speaking to Autosport in the lead-up to the Malaysian GP on Sunday, Horner admitted equalisation was not only unlikely but probably did not fit with F1's ethos either.
"When you're in a scenario like we are, where you have very limited influence over the engine - we're effectively a customer - it's frustrating when your competitiveness is compromised and you don't have control over that," Horner said.
"Is that [equalisation] likely to happen? Of course it's not. Is it fundamentally right for it to happen? Probably not either.
"I was frustrated with the situation but we also have a fairly unhealthy situation if you've got huge disparity between the different power units.
"The problem with where we're at, at the moment, is that the technology is pretty immature.
"The investment required by Renault to match Mercedes is enormous."
Mercedes won 16 of 19 races last year to win the constructors' championship by 296 points from Red Bull, while second-placed Rosberg finished over 33 seconds ahead of third-placed Vettel at Albert Park on March 15, with the latter now on the books at Ferrari.
Red Bull's leading driver - Daniel Ricciardo - claimed sixth position in Melbourne after being lapped by both Hamilton and Rosberg.