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      03-13-2020, 08:56 PM   #4
Bmwtechgeek
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Drives: Bmw m5
Join Date: Jun 2019
Location: Usa

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Quote:
Originally Posted by Qsilver7 View Post
What is the minimum AKI requirement for the s63? This should be in your owners manual or on a sticker near or around your fuel filler flap.

If it is 89 AKI...then when you get to half a tank...put the highest AKI in your area (91 or 98 AKI...this will bring the fuel left in the tank up to the minimum (if the minimum is 89 AKI).

Your owners manual also should tell you what happens when you use fuel below the "recommended" fuel spec (lower performance & higher gas consumption).

Your engine also has knock sensors that help when low grade fuel or incorrect octane is used. Here's some info from the TIS about the knock sensors...you can also go to the site, enter the last 7 digits of your VIN...then type knock control into the search box for even more info: https://www.newtis.info/tisv2/a/en/f...ensor/6LPkwe8E
Minimum is 91. It says it right on the gas cap.

I plan to drive it very gingerly until half tank and then top it off with some 94 which I can get locally.

Very informative info on the knock sensors. Thanks you are a blessing to this forum.
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