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When you change to higher octane do you need to romp on it a bit for it to learn? I got 15-16 on first leg of my trip tow the SxS with 87 octane, then mileage went in the crapper down in the 12s. I started then topping off with 91 octane, and things were not improving until leaving Ely NV I romped on it a couple times and had a tail wind. Finished up in the 15-16 range
I still don't see how Sport mode gives better MPG.
Since reading this thread last week and noticing that not a lot of people mention Eco mode, I decided to go back to regular mode for a few days. While the truck is more responsive, my mileage went down. I guess for my truck Eco gives the best overall MPG at the cost of diminishing responsiveness.
Today on I-84 in Idaho I finished today's leg at 18.3 towing a trailer. I am going to be doing more testing on using higher Octane gas!
I used to run 93 octane in my 2.7 in the late spring, through summer and always when towing. I found the performance to be a bit better, and it got better mileage. But it didn't pencil out financially.
OK, finished my 1530 commute Az to Wa. I do not think octane played that big of a difference. What caused my mileage to vary so much, wind! Saw between 12.5 and 18-19 on different fills. Average for the trip was 15.3 hand calculated. Trip 2 was close at 15.8.
When you change to higher octane do you need to romp on it a bit for it to learn?
It takes some time for it to adapt from 87 to 91 or 93. But going from 93 to 87 it reacts immediately to prevent knock.
I still havent run any premium in my 3.3. Maybe I will give it a shot but on a n/a motor I doubt there will be any difference. Certainly not a financial benefit.
Also, I have found that some people like to reset trip on flat or mostly downhill highway stretches and boast about crazy good mileage. I could hit a 60 mile mostly downhill stretch of highway and if I drove 55 or 60 with a tailwind I would bet it might hit 30mpg. But thats not a realistic MPG measurement.
