Car Court

Posted by Craiger56@aol.com (A) on November 26, 2005 at 20:10:18

In Reply to: Octane Booster posted by chris keating on November 14, 2005 at 12:28:13:

Your 06' Outback may have a "knock sensor" that listens for detonation and signals the emission control module to retard (or advance to a lesser degree) the timing under load.

Using 87 in this situation will cause a loss in performance and if taken to an extreme (although unlikely) could lead to excessive exhaust valve and manifold temperature when climbing a grade (retarded timing causes excess heat)

The octane boosters that work are pricy enough that just using 91 (super) would cost you less, they are ment for those who need 100+ octane.

Try 89 octane