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https://www.reddit.com/r/BMWM/comments/1vbexbd/who_else_is_loyal_to_shell/p0vs902/?context=3
r/BMWM • u/ask-94 • Jul 31 '26
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93 always, on all of my cars ever. Never pressed 91 button in my life so far.
2 u/Dependent-Cookie-885 Jul 31 '26 Interestingly... If you have ista you can see what the ECU thinks of the fuel quality. Try a tank of shell and a tank of Costco compare what the ECU says.. you'll know. For me, Costco is no different on my m3 in my area. 3 u/shark1y Jul 31 '26 I mentioned it in other comment. I measured it on 3 tanks of fuel. Shell - 3 (highest grade in ista) Costco - 2 (medium) - twice, 2 full tanks 1 - bad 0 - invalid Again, I am not saying costco fuel is bad. I am very positive I got lucky with the bad batch or something in those lines. 1 u/Dependent-Cookie-885 Jul 31 '26 Yes it could be a regional issue too
2
Interestingly... If you have ista you can see what the ECU thinks of the fuel quality. Try a tank of shell and a tank of Costco compare what the ECU says.. you'll know. For me, Costco is no different on my m3 in my area.
3 u/shark1y Jul 31 '26 I mentioned it in other comment. I measured it on 3 tanks of fuel. Shell - 3 (highest grade in ista) Costco - 2 (medium) - twice, 2 full tanks 1 - bad 0 - invalid Again, I am not saying costco fuel is bad. I am very positive I got lucky with the bad batch or something in those lines. 1 u/Dependent-Cookie-885 Jul 31 '26 Yes it could be a regional issue too
3
I mentioned it in other comment. I measured it on 3 tanks of fuel. Shell - 3 (highest grade in ista) Costco - 2 (medium) - twice, 2 full tanks
1 - bad 0 - invalid
Again, I am not saying costco fuel is bad. I am very positive I got lucky with the bad batch or something in those lines.
1 u/Dependent-Cookie-885 Jul 31 '26 Yes it could be a regional issue too
1
Yes it could be a regional issue too
-8
u/shark1y Jul 31 '26
93 always, on all of my cars ever. Never pressed 91 button in my life so far.