any issues with shells gas
08-24-2010, 06:06 PM
#11
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My Ride: 2011 535I X-Drive - Space Grey / Black Dakota / M-Sport / Sport Auto Transmission with Paddles / Premium I / Premium II / Cold Weather
Gone: 2010 535I - Alpine White / Black / Sport, Premium & Cold Weather Packages / Anthracite liner / Sport Auto with Paddle Shifters / Navigation / Satellite, HD & I-pod
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Love Shell 93; it is a top tier rated fuel
08-24-2010, 07:32 PM
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08-25-2010, 03:59 AM
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I use shell exclusivley. I have struggled though between 93 and 89 AKI. I had met with the BMW NA regional rep a couple years ago and he told me that my 545i will run the best on mid-grade 89 minimum AKI ( shell only). 545i calls out for min. 91 AKI.
The rep said that the engine computer will adjust as necessary to 89 Shell fuels, however the engine had a harder time adjusting to 93 AKI. He said since Shell is a top tier that 89 AKI is the minimum and that if tested I would find that its actually 90 or even 91 AKI nominal. A perfecr match for the 545i. He then said that 93 AKI theory is the same that it is 94 or 95 and above the range.
I do tend to notice a better idle when using 89 AKI but better mileage using 93 AKI, hence the struggle between the two.
The rep said that the engine computer will adjust as necessary to 89 Shell fuels, however the engine had a harder time adjusting to 93 AKI. He said since Shell is a top tier that 89 AKI is the minimum and that if tested I would find that its actually 90 or even 91 AKI nominal. A perfecr match for the 545i. He then said that 93 AKI theory is the same that it is 94 or 95 and above the range.
I do tend to notice a better idle when using 89 AKI but better mileage using 93 AKI, hence the struggle between the two.
08-25-2010, 05:00 AM
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My Ride: 2008 528i, Space Grey, Nav, PDC, Premium, Sports, Grey Leather, Xenon, Cornering...
This is great. I thought I was crazy. Someone told me they are all the same but I knew I felt the difference.
