I just had a whim and emailed Toyota CS.
They actually responded fairly quickly.
This is what they said,
Fuel additives [Incident: 150402-000181]
Ask Toyota
To
me
Dear Mr. Jones,
Thank you for contacting Toyota Motor Sales U.S.A., Inc.
We appreciate your question regarding the recommendation of fuel additives for your 2011 Camry.
The only condition that Toyota offers in regards to fuel for the 2011 Camry is that it needs to have an octane rating of 87 or higher. The use of additives such as Chevron Techron can be used at the discretion of the consumer, but are not required for use with the vehicle.
We hope that this information has been useful and that you continue to enjoy driving your Camry for many miles to come. If we can be of further assistance, please feel free to contact us.
Sincerely,
Justin Lee
Toyota Customer Experience Center
They actually responded fairly quickly.
This is what they said,
Fuel additives [Incident: 150402-000181]
Ask Toyota
To
me
Dear Mr. Jones,
Thank you for contacting Toyota Motor Sales U.S.A., Inc.
We appreciate your question regarding the recommendation of fuel additives for your 2011 Camry.
The only condition that Toyota offers in regards to fuel for the 2011 Camry is that it needs to have an octane rating of 87 or higher. The use of additives such as Chevron Techron can be used at the discretion of the consumer, but are not required for use with the vehicle.
We hope that this information has been useful and that you continue to enjoy driving your Camry for many miles to come. If we can be of further assistance, please feel free to contact us.
Sincerely,
Justin Lee
Toyota Customer Experience Center