Thread: Gas Gas Gas
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Old May 7th, 2008, 01:14 PM   #1
Dr. J
MINI2 Regular
 
Join Date: May 2008
Local Time: 12:08 PM
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Gas Gas Gas

I'm sure this has been debated but what *type* of gas is everyone using? 87, 88, 89, 91, 93,... 103? (yes I have seen stations that sell 103!)

I was careful to elaborate on this with my dealer as he said the "manual calls for 89" (before I bought the car). Online I've seen everything from 87 to 91. fueleconomy.gov says "Premium" but that means different things to different people. (I guess "premium" is anything more than 87)

With the actual manual in my hands it says that 91 is "highly recommended" but that the "minimum is 87". I'm still on my first fill up from the dealer and I'm not sure what he put in it.

The incentive is clear - it's roughly a 10 cent bump per grade - and if 91 is not absolutely required, or won't affect the MPG that much then there's no sense in putting in 91. Around here, there's roughly a 10 - 15 cent difference between 89 and 87, then 10 cents more to 91 and perhaps a few pennies to 93 (if the station sells it... usually it's either 91 or 93 but not both).

If regular (87) costs $3.75, that puts 91 at around $4, 7% more. Thus, it makes sense that if you can get a 7+% increase in MPG, filling with 91 makes sense economically.

Thoughts?
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