Jeff, I would agree, if the engine performs better and might even get a tick up in mpg, premium could be the better way to go. And those that think this way, should also consider a custom tune to their ECM to really pull out the most from the added cost of premium. As per the examples of engine design you stated, these engines are capable of a lot more than the stock settings.
33 cents a gallon difference.
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Originally Posted By: lubedude13
There is no need to run higher octane fuels unless your car requires it
False.
There is no need to run higher octane fuels unless your car requires it
False.
I am not worried about the line. I will be visiting family next weekend. I have not seen leaded gasoline sold at the PEMEX stations that I frequent.
Originally Posted By: Peted
Originally Posted By: lubedude13
There is no need to run higher octane fuels unless your car requires it
False.
I wouldn't say "false" at all. Look at the actual wording of his statement. "There is no need to run higher octane fuels unless your car requires it." That's almost impossible to argue against. If it needs a higher octane fuel, it requires it, no?
Note that I'm not saying you can't, shouldn't, or are forbidden from running a different octane rating than required. I'm simply pointing out the original quote is unassailable. The only other time there could be a "need" to run a higher octane fuel when a car doesn't require it is if a higher octane fuel was the only thing available. If you can only find premium at the pump, I guess you need to run it, then.
Originally Posted By: lubedude13
There is no need to run higher octane fuels unless your car requires it
False.
I wouldn't say "false" at all. Look at the actual wording of his statement. "There is no need to run higher octane fuels unless your car requires it." That's almost impossible to argue against. If it needs a higher octane fuel, it requires it, no?
Note that I'm not saying you can't, shouldn't, or are forbidden from running a different octane rating than required. I'm simply pointing out the original quote is unassailable. The only other time there could be a "need" to run a higher octane fuel when a car doesn't require it is if a higher octane fuel was the only thing available. If you can only find premium at the pump, I guess you need to run it, then.
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Originally Posted By: dave1251
I am not worried about the line. I will be visiting family next weekend. I have not seen leaded gasoline sold at the PEMEX stations that I frequent.
Well I don't stay near the city when I go more of the out skirts heading towards san filepe.
Just buy the leaded gas at SOCO at least then you just what your getting.
Have a safe trip.
Jeff
I am not worried about the line. I will be visiting family next weekend. I have not seen leaded gasoline sold at the PEMEX stations that I frequent.
Well I don't stay near the city when I go more of the out skirts heading towards san filepe.
Just buy the leaded gas at SOCO at least then you just what your getting.
Have a safe trip.
Jeff
Just a little more info on what i have run. After mulitple tanks of each in the 2006 chrysler 300 3.5 v6
87 E10. car runs fine.
89 E5 ?. car runs fine . under heavy load or acceleration car has more punch than 87 and slightly better mileage.
91 E ??. car runs the same as 89 no noticable difference.
As per owners manual 89 octane preferred, 87 acceptable.
93 E0 . haven't decided if i will try it in the car, will buy for small engines though.
now about the perceived better mileage on 89, i really don't care to hear about to many variables to know for sure, and i really don't care if the actual benefit in fuel mileage is there, but without a doubt the car performs better on the 89 octane.
87 E10. car runs fine.
89 E5 ?. car runs fine . under heavy load or acceleration car has more punch than 87 and slightly better mileage.
91 E ??. car runs the same as 89 no noticable difference.
As per owners manual 89 octane preferred, 87 acceptable.
93 E0 . haven't decided if i will try it in the car, will buy for small engines though.
now about the perceived better mileage on 89, i really don't care to hear about to many variables to know for sure, and i really don't care if the actual benefit in fuel mileage is there, but without a doubt the car performs better on the 89 octane.
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I did the math using my cars EPA rating.
If I got the 38MPG HW rated for my car and gained 3% MPG thats 1.14MPG better*18 gallons. So about 20-21 miles extra a tank, or the equivalent of 1/2gal.
0.33*18 = over $5 = Not worth it.
5% better MPG still not worth it.
7%, almost breaking even, again, if it was all highway driving.
If I got the 38MPG HW rated for my car and gained 3% MPG thats 1.14MPG better*18 gallons. So about 20-21 miles extra a tank, or the equivalent of 1/2gal.
0.33*18 = over $5 = Not worth it.
5% better MPG still not worth it.
7%, almost breaking even, again, if it was all highway driving.
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