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Use 93 Octane Or Not?

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93 Octane? The debate continues...

21629 Views 47 Replies 21 Participants Last post by  pL2014
I have been reading all of the internet, mostly on this forum, over the debate of filling up the Cruze with the highest octane fuel. I have had my 2012 Cruze LS 1.8L since December of 2011. Until the last two times I have filled up(past 3 years), I have used regular gasoline. But recently, I was told I need a fuel injection cleaning and told that if I simply put in a bottle of fuel cleaner as well as use Shell V-Power, that would do the trick.

I did do that and the two times I have done it, I have noticed much better performance out of my car. Not only better performance, but better millage too. I did read in the Cruze manual and it states about using at least regular unleaded fuel (87 Octane level). But the manual states you can use higher octane if you wish.

Everyone I have spoke to about this thinks, "it's a bad idea", "it's not good for your engine". Both people who know cars and others that have just had more experience with cars.

I don't see what can be the downside to using higher octane gas in the Cruze.

What are your thoughts? I am stuck with what to believe.
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I'm not sure about the 1.8, but the 1.4T definitely responds to increased octanes in terms of performance and MPG. But in colder weather, the effect of increased octance is less noticable. At least that has been my experience so far.

I use the following criteria based on average temperatures for the upcoming week to determine which octane I use:
-Below ~65-70 degrees F, 87 octane
-From ~70-80 degrees F, 89 octane
-Above 80 degrees F, 91/93 octane

These criteria give me the best combination of performance (or also lack of timing pull under load in hot weather and with A/C use) and cost. As always, YMMV.

As a further note, this is the first vehicle I have used anything other than regular 87 octane, and that was after extensive research into the affects of octane on this specific engine. For most N/A vehicles, I would just stick with 87. But it all depends on the specific engine/application.
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I think there is Sunoco racing fuel available which is 95 octane, thought it was 103 octane but its $7.19 a gallon. the problem I have out here and no it is not humid is the cost factor between 87, 89, and 91. 91 is 40 cents more a gallon, that's a lot as the grade difference used to be less than a dime in the old days. 2001 was a great year, 99 cent Gas and that was after the TERROR!
Mojave, mo problems, amirite? :smileystooges:
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