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  #25  
Old 06-18-2013, 09:22 PM
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Re: Fuel

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Originally Posted by forza View Post
He can put the lower octane fuel in. But, there is a good chance he'll be paying a lot more when his engine goes later. The lower octane is going to cause engine knock which can damage an engine.
I can't speak to the SRT specifically but certainly any vehicle I have driven that required premium had problems for sure with regular.

First off the friend there is loosing the extra savings of regular in power loss as the timing is not set for the iginition resistance so low in Regular fuel. This causes ignition in the wrong timing and does cause some unusual wear issues. He will definitely have problems down the road but he is also wasting money today he thinks he is saving.

Manufacturers don't put "Premium Required" on a vehicle becasue they think it is fun or cool.
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Old 06-21-2013, 07:12 PM
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Re: Fuel

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Originally Posted by RAC88 View Post
BP likes the gulf all right... ;-)
No more BP anywhere near the gulf. They rebadged them all as Chevrons, lol.
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Old 06-22-2013, 07:03 AM
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Re: Fuel

We in CA at the pumps that are legal to use on the road and thats 91 & 100 octane and they both have only 1.8% of oxygen mandated by CA law. In the winter ( oct to feb ) it does go up to 2.2%.
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Old 06-29-2013, 03:59 PM
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Re: Fuel

When I take trips through southern Missouri 94 oct with no alky is easy to find...I always use it when I can. The rest of the time I only run 93. Two or 300 miles on 89 and I figure your puter would start backing your timing and params down to offset it some.
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Old 06-29-2013, 08:35 PM
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Re: Fuel

... Achim is quite right, and I expect our engine does as well adjust. So there is little chance that the engine will be hurt. Power is reduced for sure when using lower grades. Most gasoline comes from geographically the same refineries. Different companies just add their additives to market them as "theirs". Hence one is likely to get the same gasoline, no matter whether you buy from Exxon, BP, Sunoco, or Costco. Just the bit of additives are different and likely make very little difference.
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Old 06-29-2013, 10:01 PM
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Quote:
Originally Posted by Faustus View Post
... Hence one is likely to get the same gasoline, no matter whether you buy from Exxon, BP, Sunoco, or Costco. Just the bit of additives are different and likely make very little difference.
I couldn't disagree more. I worked for a company that had 2 accounts for our equipment back in 2000/2001. I averaged 60,000 miles per year in my company truck, and the difference in fuel quality was obvious. I would easily get 60 or 70 miles per tank more from the good fuel supplier.
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Old 06-30-2013, 08:52 AM
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Re: Fuel

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Originally Posted by Dadio61 View Post
I couldn't disagree more. I worked for a company that had 2 accounts for our equipment back in 2000/2001. I averaged 60,000 miles per year in my company truck, and the difference in fuel quality was obvious. I would easily get 60 or 70 miles per tank more from the good fuel supplier.
Faustus is correct that the main difference between different gas brands is the additives that are added. The government has set guidelines for the amount of additives that need to be in the gas; some brands do the bare minimum while others add 4x the amount required.

The thing with refineries too is that just because refinery brand X processed/refined the gas, it doesn't mean when that tanker leaves the plant that it's going to brand X gas stations. Branded gas stations do buy gas from competitor refineries. Then places like Costco and other supermarket gas stations, when they fill up their tanks, they usually buy whatever gas distributor was the cheapest that day. The supermarkets very well could have contracts but more or less, it's a roll of the dice of who's gas your are actually using.

Since all this branded gas is mixed between multiple gas stations, the gas stations create their own product by adding of the additives. So when you buy gas, you're buying the brand name and their additives. Supermarket gas tends not to have any additives.

60-70 miles extra is a huge difference in my eyes and that's awesome you could get that. The thing with talking about fuel economy of different gas blends, it's really difficult. There are tons of factors that go into fuel economy - ethanol content, weather conditions, did the gas station switch season blends yet, user throttle response, the list goes on, haha.
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