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Old 09-30-2013, 03:03 PM   #11
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Are you saying 93 octane wont make more TQ/HP then 87 octane ?

Tom
Sort of, I was saying 93 octane gas does not have additional energy density over 87. It probably makes more power/tq, but anything that is noticeable/useful with stock components and no tune and switching a couple of tanks of gas over a weekend trip to 93 is not going to make much of a difference, the car has enough power stock to handle normal driving up hill at the speed limit.
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Old 10-01-2013, 02:01 PM   #12
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Nice recovery.
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Old 10-01-2013, 03:08 PM   #13
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Sort of, I was saying 93 octane gas does not have additional energy density over 87. It probably makes more power/tq, but anything that is noticeable/useful with stock components and no tune and switching a couple of tanks of gas over a weekend trip to 93 is not going to make much of a difference, the car has enough power stock to handle normal driving up hill at the speed limit.
93 will not only make more HP and TQ but when under high loads weather it be 4 people in the car, up hill or WOT 93 octane offers more protection from preignition / knock , to me thats what would be most important

Tom
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Old 10-01-2013, 03:25 PM   #14
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93 will not only make more HP and TQ but when under high loads weather it be 4 people in the car, up hill or WOT 93 octane offers more protection from preignition / knock , to me thats what would be most important

Tom
E85 offers supper high octane levels and would be safer from that standpoint then. But yes for those reasons 93 is better, but if his engine is not knocking in the first place it is not needed. That being said I agree for the $4 or $5 a tank that will be paid for the trip it can't hurt.
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Old 10-01-2013, 03:39 PM   #15
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Thats a big "but if" , For no more then the cost going to 93 it would be well worth it

e85 does not have super high octane , have it tested your self I did , buy a cheaper tester that tests the E in e85 and tell me what you find , I have never tested one where it was 85% ever

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Old 10-01-2013, 04:00 PM   #16
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Thats a big "but if" , For no more then the cost going to 93 it would be well worth it

e85 does not have super high octane , have it tested your self I did , buy a cheaper tester that tests the E in e85 and tell me what you find , I have never tested one where it was 85% ever

Tom
I don't doubt that, and I am sure a lot of places blend it with less than 87 octane gas, E85 is supposed to be 105 octane, so even if they cheap out and it is lower there is still a fairly large gap from 105 to 93 where it would have an octane advantage. Not saying E85 is great and I have only run a handful of tanks on E10 even.

It isn't that he shouldn't choose 93, but if he never asked the question ran 87 on the trip it is pretty unlikely that there would be a thread about how he blew an engine going up hill with 4 passengers.

Here is an interesting article that shows how E85 is rated and can contain as little as 70% ethanol http://www.hotrod.com/techarticles/h...l/viewall.html
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Old 10-01-2013, 05:59 PM   #17
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93 will not only make more HP and TQ but when under high loads weather it be 4 people in the car, up hill or WOT 93 octane offers more protection from preignition / knock , to me thats what would be most important

Tom
Coming from owning a '98 Dodge Ram 1500 that pinged for 6 years, I'd really like to not have this concern. Although some might say if it ran for 6 years while pinging, what is the concern? Regardless, my question wasn't pertaining to pinging, per say, however that is a good point to bring up. I was mainly wondering about the "additional performance" I might see, as stated in my owner's manual, for the added weight.
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Old 10-01-2013, 06:52 PM   #18
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I was mainly wondering about the "additional performance" I might see, as stated in my owner's manual, for the added weight.
There has been debate about that line in the past, and it is removed in the 2013 manual.
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Old 10-01-2013, 07:06 PM   #19
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There has been debate about that line in the past, and it is removed in the 2013 manual.
Ahhh really... I didn't know it was removed. How about that.
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Old 10-01-2013, 07:07 PM   #20
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93 will always make the safest and best performance

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