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Discussion Starter · #1 ·
For the last month I've been running 93oct vs 89oct. I also replaced my stock air filter with a K&N drop in. During my 85 mile daily commute (60-75mph on hwy and some stop and go traffic) my avg economy went from 34-35mpg to 37-38mpg and now getting over 500miles of range on a tank. Not to bad. Usually have 40psi in the tires also. I'll be ordering the trifecta tune so maybe it will increase slightly more.
 
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For the last month I've been running 93oct vs 89oct. I also replaced my stock air filter with a K&N drop in. During my 85 mile daily commute (60-75mph on hwy and some stop and go traffic) my avg economy went from 34-35mpg to 37-38mpg and now getting over 500miles of range on a tank. Not to bad. Usually have 40psi in the tires also. I'll be ordering the trifecta tune so maybe it will increase slightly more.
Did you calculate the difference to see if it's worth the cost to use 93? Of course dependent on the price difference form 89 to 93.
 

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Livng in MD it's a 50/50 chance depending on where he gets gas. I had some stations where they had a larger gap vs another station farther down the road. When I lived in NoVa I had 2 cars that were clearly marked premium fuel only.
 

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Gas down here is funny - you can have two Shells practically across the road from each other with a price variance of 10 cents between them. That's why I carry my Shell Fuel Rewards card :D
 
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Gas down here is funny - you can have two Shells practically across the road from each other with a price variance of 10 cents between them. That's why I carry my Shell Fuel Rewards card :D
That FRN card does wonders sometimes, Total rewards casino card can also be linked to it.
 

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Did you calculate the difference to see if it's worth the cost to use 93? Of course dependent on the price difference form 89 to 93.
I've run either 89 or 93 since getting the car and haven't ever noticed an MPG difference between the two. In fact my current fill of 89 is on track to be one of my best ever MPG tanks. I use 93 for smoothness during summer but now that it's cooling off again I'm watching my Fuelly dip towards $0.09/mile. :smile:

I would love to take advantage of the FRN, but have to go far out of my way to find a participating Shell, lame. I just fill at local-chain high turnover stations instead.
 

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I don't know what the price of 93 is near you, but here the gas stations are now charging 60, 70 or even 80 cents more than 89. If that is the case by you it can't be worth spending 20% more on gas to only get a 9% increase in mpg.
 
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I've run either 89 or 93 since getting the car and haven't ever noticed an MPG difference between the two. In fact my current fill of 89 is on track to be one of my best ever MPG tanks. I use 93 for smoothness during summer but now that it's cooling off again I'm watching my Fuelly dip towards $0.09/mile. :smile:

I would love to take advantage of the FRN, but have to go far out of my way to find a participating Shell, lame. I just fill at local-chain high turnover stations instead.
I have a Shell and a Safeway station near me. The Safeway gets gas resupply about every 4 or 5 days. The Shell, every couple of weeks. I get my gas at the Safeway. When I use a high volume Shell station about 10 miles from my house.
 

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Ive always used 93 with occasionally adding an octane booster/fuel system cleaner.
 

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Adding octane boost to 93?! lol, now that's intense. :)

To be fair, while 89 works pleasantly for myself and many others, at least when it's cooler outside, in the glovebox label there's an RPO code of "KRD" listed, which indicates 91 octane. In the UK owners manual for the 1.4T engine it also lists 95 RON (91 US octane) Recommended, 91 RON (87 US octane) Possible.

UK manual link - http://www.cruzetalk.com/forum/9-ge...-do-you-use-your-1-4t-cruze-4.html#post796937
 

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Discussion Starter · #12 ·
Its only a $2-3 difference a tank 89 vs 93 so to me it's worth it. I live about 45min west of Baltimore. 89 is $3.35 and 93 is $3.53 currently. Also there are stations near me that on Tuesdays or Saturdays discount gas by $.05 a gallon. I now have had a Trifecta 93oct tune for a couple months and averaging right around 40mpg.
 
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