Machan Posted August 4, 2015 Report Share Posted August 4, 2015 95 Octane & Fuel Economy My Ford service provider (Dubai-UAE) said that there is an additive in the 95 octane (recently added) that's affecting the fuel economy. This answered why I was getting between 7.8 - 8.3 km/L (18.3 - 19.5 mpg) combined, which means around 500-550km on a tank (depending on how heavy my foot is).So the service provider advised I change to 98 octane - which I did this morning which gave me at the end of today 8.9 km/L (20.9 mpg) combined.Which means technically I should get 600-647km to the tank (depending on how heavy my foot is).What fuel do you use and what's your economy rate? 1 Quote Link to comment Share on other sites More sharing options...
omar302 Posted August 4, 2015 Report Share Posted August 4, 2015 You should also state if you have a FWD or AWD Edge. Also remember that octane rating method is different, UAE/GCC 95 octane is equivalent to 90 in US while 98 in UAE is equivalent to 93. US uses AKI method while GCC countries use RON. Furthermore, I have always noted fuel economy here (GCC) is always much worse than what people get in US. I get between 15.5 & 18 MPG (US gallons by the way = 3.785 liters) with my 2011 3.7L AWD MKX. In Doha we have extreme stop & go driving. 3 Quote Link to comment Share on other sites More sharing options...
Machan Posted August 4, 2015 Author Report Share Posted August 4, 2015 Hi omar302, that's useful info on the octane comparison. Thanks. I drive a 3.5 AWD. Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted August 4, 2015 Report Share Posted August 4, 2015 (edited) Great pic of the Edge btw, Machan Why do you think the fuel economy is worse in the GCC, omar? Is it the constant high heat/dust in the air/etc? Edited August 4, 2015 by WWWPerfA_ZN0W 1 Quote Link to comment Share on other sites More sharing options...
carguy75 Posted August 4, 2015 Report Share Posted August 4, 2015 (edited) To be honest I notice that my Edge seems to drives better(I get an average of about 21-22 mpg around town sometimes even higher if i drive really easy) with 89 octane vs. the 87 octane gas(got an average of 20-21 at the most when I last used it). I have never tried the 93 octane in my Edge, but looking at the how the 3.5 has an compression 10:8 I would bet that it could benefit from high octane gas as well. I know some will argue that Ford recommends regular gas, but the higher octane gas will prevent the knock sensors from retarding some of the engine timing which affects horsepower and most likely fuel economy. I believe that any engine that has a 10:5 compression or more needs high octane gas to run at its "best", notice that I do not say at all. The old 3.0l Ford V6 engine had only a 10:0 compression so high octane gas actually made them run worst(learned that with my old 2005 Mercury Montego AWD). But, the newer V6 engines are beast with pretty high compression so I would use 89 octane or better to get the most out of these engines. Edited August 4, 2015 by carguy75 1 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted August 4, 2015 Report Share Posted August 4, 2015 The 2011+ have adaptive tunes from the factory, so they can take advantage of different grades of gasoline. But if the engine has a problem, you might be running on tables for 89 or 91 gasoline when you have actually 93 in the tank. But if the engine is running well, then definitely, more powah, more mpg, hooray! 1 Quote Link to comment Share on other sites More sharing options...
carguy75 Posted August 4, 2015 Report Share Posted August 4, 2015 The 2011+ have adaptive tunes from the factory, so they can take advantage of different grades of gasoline. But if the engine has a problem, you might be running on tables for 89 or 91 gasoline when you have actually 93 in the tank. But if the engine is running well, then definitely, more powah, more mpg, hooray! That explains the gains i felt after changing to mid-grade gas and my performance air filter. The newer engines does adapt well to changes made to the engine. I read that the variable valve timing is pretty impressive in the new 3.5 and 3.7 engines, plus the added benefit of adaptable octane tables for high octane gas makes these some fun engines to drive. My butt dyno was not lying it seems. 1 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted August 4, 2015 Report Share Posted August 4, 2015 LOL ... Yeah, the tech constantly gets better, and usually to our benefit. The only problem I have is that because a lot of these systems do their work quietly in the background, when a trouble spot does arise, it can leave you high & dry because you have NO idea what to do. That's one of the reasons I get extended warranties, just easier to plan that way for me 1 Quote Link to comment Share on other sites More sharing options...
omar302 Posted August 4, 2015 Report Share Posted August 4, 2015 Why do you think the fuel economy is worse in the GCC, omar? Is it the constant high heat/dust in the air/etc? 1- Driving habits & traffic. We have a lot of stop & go. For example, for a 3 mile trip, you can easily go from 0-60mph 3-4 times because of the many signals and/or roundabouts. 2- Heat. Which also causes a lot of engine idling for A/C to keep interiors cool when waiting even for long periods. 3- This is only my guess, since we do live in the 3rd world, I don't expect the fuel energy content is up to standards as there is no body to check or ensure fuel grades are ok. 1 Quote Link to comment Share on other sites More sharing options...
macbwt Posted August 4, 2015 Report Share Posted August 4, 2015 Omar, Just kidding ya but if you would drive on the road instead of the sand your gas mileage would be better. Seriously are the octane ratings there that much different than the US? I would have to fuel up at the airport to get that type of octane. You should also state if you have a FWD or AWD Edge. Also remember that octane rating method is different, UAE/GCC 95 octane is equivalent to 90 in US while 98 in UAE is equivalent to 93.US uses AKI method while GCC countries use RON.Furthermore, I have always noted fuel economy here (GCC) is always much worse than what people get in US. I get between 15.5 & 18 MPG (US gallons by the way = 3.785 liters) with my 2011 3.7L AWD MKX. In Doha we have extreme stop & go driving. Quote Link to comment Share on other sites More sharing options...
omar302 Posted August 5, 2015 Report Share Posted August 5, 2015 Omar, Just kidding ya but if you would drive on the road instead of the sand your gas mileage would be better. Seriously are the octane ratings there that much different than the US? I would have to fuel up at the airport to get that type of octane. Octane rating method is different, US uses AKI while GCC countries use RON methods for indicated fuel octane ratings. GCC 97/98 octane is equivalent to ~92/93 in US GCC 95 octane is equivalent to ~90 in US GCC 90/91 octane is equivalent to ~87 in US It is very common here for people to misunderstand the different octane ratings & they would thing that 90 is much better than the manufacturer recommended minimum of 87 while they are really the same. https://en.wikipedia.org/wiki/Octane_rating 2 Quote Link to comment Share on other sites More sharing options...
PrinzII Posted August 7, 2015 Report Share Posted August 7, 2015 Omar, this is a very interesting post and has me thinking about that as well. I am also wondering if the percentage of ethanol added to many gasolines have an effect on MPG. To give you an idea, I normally fill up with 89 Octane because premium is at different octane levels across the country. For instance, Arizona's premium is 91 octane. New Mexico is 92/93 but their low end is 85. When I drove to Chicago from Phoenix, I used mid-grade for the most part. There were certain points I jumped to premium and saw a difference in mileage. I also noticed that certain brands tend to fare better than others in our vehicles. For instance, Chevron goes through our Edge like water. Shell and Arco do not. Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted August 7, 2015 Report Share Posted August 7, 2015 Do you typically run FI cleaner through the fuel system, Prinzll? Sounds like a spark plug change as well as PCV valve change (plus air filter for all your AZ folks ) is in order! Quote Link to comment Share on other sites More sharing options...
omar302 Posted August 7, 2015 Report Share Posted August 7, 2015 @Prinzll, reading here, it seems that E10 mean "up to 10% Ethanol, so depending on the fuel/brand your using, Ethanol percentage might be anywhere from 0-10% & hence will definitely affect mileage. Quote Link to comment Share on other sites More sharing options...
macbwt Posted August 8, 2015 Report Share Posted August 8, 2015 In Iowa if you want just gasoline you are forced to use 87 octane and that is it. All other octane ratings will be E10 mixtures. I do tend to get better fuel mileage with the higher Octane, but I would not say I see big jumps. I usually burn through the 91 octane averaging about 24mph at speeds of 75-80mph, which is not bad when you consider the speed I am driving. I did get nearly 27 mpg when I took my back road route and was driving 60mph. Lesson is Octane, speed = effect fuel mileage. 1 Quote Link to comment Share on other sites More sharing options...
PrinzII Posted August 10, 2015 Report Share Posted August 10, 2015 (edited) Perf: Spark plug change was done at 90K. I can say the air filter should need a change (Changed a few months ago) but I have not had the PCV valve changed. Might have to look at the PCV valve. Have not run FI cleaner in the Edge at all. Edited August 10, 2015 by PrinzII 1 Quote Link to comment Share on other sites More sharing options...
Machan Posted August 10, 2015 Author Report Share Posted August 10, 2015 Ok, so of the first topup I got 9.1/L on the first two days which were mostly highway and then it came down to 8.6/L due to moderate city traffic and then dropped to 8.4/L overall with 550kms done and 60km till empty. With the 95 I averaged 7.8/L (very heavy foot) to 8.2/L which means there not a big difference in mileage. BUT the driving experience has totally changed. The pick-up is much better, there's minimum lag in quick acceleration (quick overtakes), and a little less engine noise. I love the driving experience with the 98, so I'm trying a second re-fill which so far on day 2 is giving me the same reading.Watch this space... Quote Link to comment Share on other sites More sharing options...
macbwt Posted August 10, 2015 Report Share Posted August 10, 2015 You may want to watch my video on the spark plug removal and installation the PCV is not just a PCV but an assembly that can only be purchased through FORD. Do not buy the PCV through the parts store as they only sell the PCV and the PCV is connected to a Heat Seated plastic tube that is part of a quick connect assembly. Check out my video on spark plug changes and you will understand exactly what I am talking about. I removed mine and cleaned it with throttle body cleaner and reinstalled it because I was unable to change it out. Perf: Spark plug change was done at 90K. I can say the air filter should need a change (Changed a few months ago) but I have not had the PCV valve changed. Might have to look at the PCV valve. Have not run FI cleaner in the Edge at all. 1 Quote Link to comment Share on other sites More sharing options...
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