BTW. Most of us who had cars (especially cars that were not so new) in the "old days" before electronic ignitions and fuel injection knew that engine knock is much more likely to occur on a very hot day, compared to a cold day. And we also know that engine knock can be reduced or eliminated by using higher octane fuel.
$34.99...
Apr 23, 2008
53 Replies
Very true.
Engines that can produce more horsepower when using premium but can still run on regular do so because the ECM is programmed to advance the ignition timing more aggressively. Advancing timing more aggressively can lead to knocking. Modern vehicles have knock sensors, and if the sensor detects pinging or knocking, the ECM retards the ignition timing until the knocking stops. Since premium fuel resists knocking better than regular, the ignition timing can be advanced more before it has to start retarding the timing.
In other words, the higher horsepower comes from the advanced timing, not cooler combustion.
Yes, the LIEberal Deomcrats crossed over to help McCain win, now they get mad at the Republican'ts when they return the favor to help Hillary win.
So can we legally get someone to change his name to None of the Above, so we can write him in?
Charles the Curmudgeon
"Ray O" ...
OK, now I'm confused again. Sounds like premium or mid-grade would still be better, even in my little car?
Natalie
"Jeff Strickland" ...
Ah, thanks.
:-D
Natalie
At no time did I ever say, nor did I ever imply, that additional horsepower comes from cooler combustion.
Besides sidestepping your post that I refuted, you are now trying to completely make up quotes, and then refute them, in order to make your own wrong answers look less conspicuous.
I suspect that the Echo calls for 87 (regular) octane, but many Toyota V6 engines are specifically designed to run on regular or premium, with better horsepower with premium (and therefore better fuel economy).
So the correct answer is to look at the users manual, and see if calls for:
- Regular
- Premium
- Regular or Premium
Possibly, but very unlikely, especially if you don't floor the gas pedal when the light turns green.
Echos and Scions are going to programmed with a bias towards fuel economy instead of performance, so regular will do just fine.
"Ray O"
Danke
:-)
Natalie
You're welcome!
I don't get offended when you post information contrary to mine. I do get offended when you misquote me, then refute my misquoted statement, and meanwhile ignore the part of my post that proves you are wrong.
If you say so...
:-)
Natalie
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