Gas... 87, 89...

I have 2014 R/T. Owners manual says 91 or higher. With in the first 1000 miles the lifters went bad, and they said it was the type of gas we were using (93 octane). When I told them that we use 93 octane, they were like uh yeah you have to use top tier gas (Shell, Exxon, etc.). Which we were using, now from time to time my CEL comes on and if I put in a can of fuel treatment the light turns off. When the CEL light comes on , the mechanic said it was cylinder two mis-firing. Either Injector, COP, or the actually plug.

 

I read some 93 Octane Gas has Ethanol but the 91 does not
https://www.pure-gas.org/index.jsp?stateprov=CA

 

My 2017 SXT Plus needs 87 octane per the owners manual. It goes on to state performance may be degraded with higher octanes.
I believe the R/T is designed for 89 octane, with 87 permitted IF you have an auto trans; and 91 is required if you have a manual trans (go figure). Anything with the 6.4L requires 91.

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Yep were pretty Lucky to have Costco 91 octane and ethanol fre at a good price to boot!!

 

My 5.7 says 87or89 but I have only ran 87 one time when gas was hard to get here in Miami after the hurricane (you got what they had, they would run-out a couple hours after shipment). I mostly wanted to post because of how impressed I am with the mileage on my first road trip last week, 22mpg at 85mph with the cylinder cut back in operation. I never liked that feature but I'm beginning to understand it's purpose! My 4.8 liter 650i would only do about 17-18 mpg.

 

87 is all I've ever used.

 

Me loves all of the placebo effects I can read about in one evening

exhaust easily picks up what 20hp lets say
c.a.i meh 10hp maximum
lowered 2 1/2 hp
fogs in the on position 4hp
and the big one yes why yes indeed a catch can will push. upwards of 25hp

In with the listed mods equals what 61 1/2 hp so its time to fly the friendly skies errrrr hang on that is for United Airlines.