Is High Grade gas really necessary?
#46
Originally Posted by DaveB
Haha. In the first post of this thread says he says the price of premium was $2.25. In Overland Park, KS, the price today was $3.09 for premium
I imagine I'll see $3.30-3.40 by the end of next week.
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#49
#50
OK...I have seen the error of my ways. One dumb question: if the car's ECU has "detuned" the performance due to the under-recommended octane fuel, is it safe to say that it will "tune" itself again to the old performance levels I have come to love if I put 91-octane gas in it next tank full? Please don't say that I have to go to the dealer and have them reprogram the ECU...
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#52
If you don't hear pinging, it is unlikely that you will damage your engine. However, depending on the compression characteristics of your engine, if you use a fuel with insufficient octane, your anti-knock sensors may be kicking in, and retarding your timing to prevent detonation ahead of the flame front as well as changing other performance characteristics. This can not only affect performance but ALSO FUEL EFFICIENCY. One also needs to be careful that changing conditions does not lead to pinging or knocking under high load conditions (like the mother-in-law in the car or driving mountain roads).
#54
#55
Originally Posted by davistld01
The "veterans" get their collective panties in a wad when a subject comes up that has been beaten to death in a new thread...I was just attempting to save some whining and crying.
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#56
Why by the expensive car is you cant afford the expensive gas? all you saying your paying 2.25/gallon for 91/93... YOUR FUC*ING LUCKY, here in So Cal its 3.20/gal $55 to fill up. So stop your whining and pay the extra couple of bucks for the 91/93. And on that note, using a lower grade gasoline 87/89 wont hurt your engine performance if you use it every once in a while. If you use it for a long period of time eventually your performance will drop and long term damage will be done to your engine. If you want your G to last use 91/93 if you dont use the cheap ****.
#57
#58
Originally Posted by davistld01
The "veterans" get their collective panties in a wad when a subject comes up that has been beaten to death in a new thread...I was just attempting to save some whining and crying.
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Bringing back a useful thread is AOK -- It shows that some are searching and taking the time to use an existing resource rather than create a new one.
This thread will benefit everyone. kudos for reviving it.
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Originally Posted by davistld01
OK...I have seen the error of my ways. One dumb question: if the car's ECU has "detuned" the performance due to the under-recommended octane fuel, is it safe to say that it will "tune" itself again to the old performance levels I have come to love if I put 91-octane gas in it next tank full? Please don't say that I have to go to the dealer and have them reprogram the ECU...
I'm not expert but from what I understand, the ECU will readjust to the higher octane and quickly.
What I'm unclear on is how far the ECU 'detunes' the timing to account for the lower octane gas.
To me this is important too, because if lower octane is used that is sold as 87 and isn't quite up-to-snuff and is stale, and/or contaminated, it would yield maybe 85 or even 83 octane which may be outside the detuning parameters of the ECU thus causing some detonation damage.
At least with 91/93 octane - if it's substandard, stale or contaminated, it's 89 or even 87 octane is sufficient and probably won't do any damage.
I personally like the higher octane even when priced highly because it contains more cleaners and will help the engine's valves, pistons, and combustion chambers as well as fuel injectors stay clean.
Something to ponder.
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