fuel
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Joined: Jun 2004
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From: Berkshire, UK
Re: fuel
Originally Posted by kev1976
To kinda get this thread back on topic, here is a little pet peeve of mine with regards to fuel.
If the minimum octane rating for the Crossfire is 91, why can't I buy it 91 octane anywhere?
Around here all that's available is 87, 89, 93, 94. Isn't 93 and 94 overkill?
And what car requires 89 octane? I've never come across one.
I'll continue to buy 93 octane of course (buying premium gas costs only about $3 more per tank).
I just thought I'd give my little rant.
If the minimum octane rating for the Crossfire is 91, why can't I buy it 91 octane anywhere?
Around here all that's available is 87, 89, 93, 94. Isn't 93 and 94 overkill?
And what car requires 89 octane? I've never come across one.
I'll continue to buy 93 octane of course (buying premium gas costs only about $3 more per tank).
I just thought I'd give my little rant.
In the UK we can only get 95 or 98 octane fuel.
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From: Berkshire, UK
Re: fuel
In the UK we can only get 95 or 98 octane fuel. 98 is classed as "Super Unleaded". I used to have a BMW Z3 M Coupe, with that you could only put one normal (95) tank of fuel in every 4 fill ups. And as a driver, you certainly noticed the difference when you did go with the lower grade. Less performance and more smoke from the exhause.
Last edited by saldous; May 10, 2005 at 09:12 AM.
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From: Burnaby, BC
Re: fuel
Originally Posted by kev1976
And what car requires 89 octane? I've never come across one.
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From: Zurich, Switzerland
Re: fuel
Is octane really mesured differently?
The octane number just shows the ratio of n-heptane (0 octane) and 2,2,4-trimethyl-pentane (100 octane). It means a probe of gas with 90 octane equals a mixture of 90% 2,2,4-trimethyl-pentane and 10% heptane.
These tests are made in a standardized motor.
The octane number just shows the ratio of n-heptane (0 octane) and 2,2,4-trimethyl-pentane (100 octane). It means a probe of gas with 90 octane equals a mixture of 90% 2,2,4-trimethyl-pentane and 10% heptane.
These tests are made in a standardized motor.
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From: Palmdale, CA
Re: fuel
In the US, the octane rating is the average of two tests, the research and motoring tests. That's why the octane rating on the gas pump will say (R+M)/2. The UK octane rating is only the research number (RON), so it will be a higher number for the same fuel in the US.
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Re: fuel
Originally Posted by C_Plunkett
In the US, the octane rating is the average of two tests, the research and motoring tests. That's why the octane rating on the gas pump will say (R+M)/2. The UK octane rating is only the research number (RON), so it will be a higher number for the same fuel in the US.
Joined: Dec 2015
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From: florida
Re: fuel
I'm gonna install Rob's Cat Deleat pipes on my Graphite car then I will start runnung 100 LL (100 octane low lead) av gas.
I run av gas in all my old cars, even the Model A which has a compression ratio of about 6 to 1. The valves on these old flatheads need a little lead for the valves. I don't see why the SRT6 wouldn't like it. Plus av gas doesn't stink. Any comments?
It must be hot sh-- to be drivin a Crossfire at the age of 16. I drove a Cushman.
I run av gas in all my old cars, even the Model A which has a compression ratio of about 6 to 1. The valves on these old flatheads need a little lead for the valves. I don't see why the SRT6 wouldn't like it. Plus av gas doesn't stink. Any comments?
It must be hot sh-- to be drivin a Crossfire at the age of 16. I drove a Cushman.
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Joined: Apr 2006
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From: Ontario
Re: fuel
I'm gonna install Rob's Cat Deleat pipes on my Graphite car then I will start runnung 100 LL (100 octane low lead) av gas.
I run av gas in all my old cars, even the Model A which has a compression ratio of about 6 to 1. The valves on these old flatheads need a little lead for the valves. I don't see why the SRT6 wouldn't like it. Plus av gas doesn't stink. Any comments?
It must be hot sh-- to be drivin a Crossfire at the age of 16. I drove a Cushman.
I run av gas in all my old cars, even the Model A which has a compression ratio of about 6 to 1. The valves on these old flatheads need a little lead for the valves. I don't see why the SRT6 wouldn't like it. Plus av gas doesn't stink. Any comments?
It must be hot sh-- to be drivin a Crossfire at the age of 16. I drove a Cushman.
lol!! That crack's me up!
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From: Orlando
Re: fuel
The definition may be similar but the tests are different. I figure the PON (what is on a US pump) to be about 4 less than the Research method. So what is on the pump may be 93 but the Research number would be 97-98.
I usually fill at 1/2 tank and aternate between 89 and 93 (today 93 at Sams was $2.20 9/10 (US pumps are always marked this way) per US gallon.
If mostly Interstate driving in the flatlands I may lean more to 89 since not at high load.
(nothing about the NA engine should need more than 87 PON but Merc always specs 91. Suspect that may be Research. but possibly results from the non-optimal plug location so I mix 89 and 93. Merc fixed in the next generation V6. )
What does the UK handbook specify please ?
ps the higher the octane the slower the flame propagation rate so 100 or 110 is going to need more advance than 91.
I usually fill at 1/2 tank and aternate between 89 and 93 (today 93 at Sams was $2.20 9/10 (US pumps are always marked this way) per US gallon.
If mostly Interstate driving in the flatlands I may lean more to 89 since not at high load.
(nothing about the NA engine should need more than 87 PON but Merc always specs 91. Suspect that may be Research. but possibly results from the non-optimal plug location so I mix 89 and 93. Merc fixed in the next generation V6. )
What does the UK handbook specify please ?
ps the higher the octane the slower the flame propagation rate so 100 or 110 is going to need more advance than 91.
Last edited by Padgett; Jan 4, 2016 at 06:18 PM.
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From: Greensburg, PA
Re: fuel
I do basically the same but I fill when down to about 1/4 tank and put in 93 for miles/40 gallons then fill the rest of the way with 89 when I got to Sheetz or Speedway. Sunoco has 91 near me so I just use that. I may play with the torque app and see if it detects any knock on 89 or lower.
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From: Las Vegas, NV
Re: fuel
"And what car requires 89 octane? I've never come across one"
My other car is a 2012 Dodge Charger RT. All the hemi's from Chrysler Corporation specify "mid-grade" gasoline, or 89 octane.
My other car is a 2012 Dodge Charger RT. All the hemi's from Chrysler Corporation specify "mid-grade" gasoline, or 89 octane.
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Joined: Jul 2015
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From: Greensburg, PA
Re: fuel
Yep, same as my 2006 I traded on the Crossfire, it said 89 as well. I also had a Diablo Sport tuner for it, could put a tune on that was for 87 (I did that in winter) 91, or 93.
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