Quote:
Originally Posted by ThaBigUnit
Ditto! My step father works for Toyota at the National HQ in Torrence, CA, and is one of head parts managers. He stated the exact same thing as RYU did. Scion legally has to say only use whatever octane was used to get the performance and MPG numbers. It wont hurt the vehicle at all but could possible deminish performance and decrease MPG slightly. Everyone else are idiots and clearly have not done their homework.  |
If he knew what he was talking about he would have told you that anything under the 93 octane will 'definitely' diminish performance and also reduce fuel economy, not 'possibly'.
The engine is detuning itself to cater for the lower octane in proportion to the level it needs to go to avoid damage. It was never designed to run like that.
Have a word with someone in the service department instead of spare parts.
Has anyone got some dyno figures to show how much power is lost?