Economy, Plus and Premium grade gasoline

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Originally Posted By: mechtech2
If an engine is designed for high octane, use it.
Relying on a knock sensor to retard timing is a substandard way to go.





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This is what I`ve been telling people over on the Club Lexus board for years now!
 
Originally Posted By: lexus114
Originally Posted By: mechtech2
If an engine is designed for high octane, use it.
Relying on a knock sensor to retard timing is a substandard way to go.





thumbsup2.gif
This is what I`ve been telling people over on the Club Lexus board for years now!


+1.
 
I'm of the opinion that knock sensors are becoming a part of the daily feedback engine control. Yes they started as a lifesaver on turbo engines-- even carbed Regal turbos from 1979-- and something that only kicked in during an emergency.

But now, especially with throttle by wire and cylinder deactivation, they can do all kinds of weird things behind the scenes and still present the driver with a smooth running and accellerating engine.

The best way to find out is to cruise around with a scantool. But I wouldn't fear a problem if I found retard on a hot day.
 
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