Agreed. Ethanol also has increased corrosion issues. I had trouble finding any articles for gas without 10% ethanol (and it is hard to find at the pump. Where I have found it they want a much higher price !)
Their paper claims a 4% increase in engine efficiency with Premium gas over Regular gas.
They obtain this improvement by shifting to higher engine compression.
E10 Gas
AKI
RON
Efficiency Gain
(R+M)/2
R
Regular
87
91-92
Baseline
Mid-Grade
91
96
3%
Premium
93
98
4%
87
First learning: Octane Ratings and Ethanol Content of US Market
1: there is considerable variation in the fuel we actually get. The 87 Octane (AKI) may range from 91 to 96 (expected 91-92)
2. Fuel sales were 875 Regular (87 AKI), 3% Mid grade (91 AKI), 10% Premium (93 AKI).
3. Premium peaked...
Perhaps my estimate of an 0.7% increase is not that bad after all.
Car and Driver ran a test on a number of vehicles and saw a 'slight' improvement in MPG of about 1%. However their testing was done at 75 MPH ! It would be interesting if they did their testing at a better speed - like 55 MPH...
Rotisserie style?
Interesting. I believe you. That goes with what I observed with my previous vehicle, my Honda Accord. I would use the higher grades for long trips because of the extended range.
I shall have to try the higher grade of gasoline. But which one?
The FORD manual states: "For...
I was sad because... well did you watch her video?
So where are the actual tests? I would not use my quick calculation as the result. Someone must have run the tests. Regular and Premium Gas is everywhere.
The other key variable would be the volume of fuel and air used. So are the engine...
I know next to nothing about car oils.
Many years ago at work, I convinced the plant to change from using mineral oil to a synthetic oil (alkyl-benzene). The mineral oil was degrading in under three months on our compressors. After switching to the synthetic oil, we got reasonable oil life...
Thank you.
I think the key difference would be the 'additives' - the stuff that keeps the carbon deposit buildup over time down. Unfortunately, the manufacturers do not give us the information on what and how much they add.
I am a recently retired Chemical Engineer. The BTU value of the fuels are NOT the same!
In this American Chemical Society video, we have to get 7:32 minutes into the 8:43 minute video before she FINALLY admits that the higher Octane fuels have a wee (teeny tiny) bit more energy... but she then...
I am using E10 (10% alcohol) regular (87 Octane) currently.
I am curious as to what your testing has found for the effect of Octane rating. For my Accord, I thought I observed an improvement in MPG. Online research (AAA, et. al.) are claiming the Octane rating has no effect on MPG.
They do...
Not bad. Normal driving mileage is about 26-27 MPG.
But long trips are cruising speed have been ~43 MPG.
Initial: 27.3 MPG 132.7 miles 6.841 Hours. 19.4 MPH.
First trip: 43.3 MPG 382.0 miles 7.229 hours. 52.8 MPH.
Vacation: 26.1 MPG 263.7 miles 12.544 hours. 21.0...
not a big fan of the Apple air tags.
I lost one at work. I was within 15 feet of it, but it never directed me to the location.
Eventually the tag ended up 30 miles away. Never could find where the tag was in the two days I searched for it. All I got was ‘tag is nearby’.
Manual calculation:
Fillup: 9.216 gallons regular unleaded with 10% ethanol.
MPG: 381 / 9.216 gal = 41.3 MPG
Hmm, I neglected to add the few miles to the gas station. Small error. The larger error is the amount of gas.
LOL. I am very skeptical too ! That is why I am asking.
if it seems to good to be true, it probably is.
Can’t speak to the previous owner. I have done 14 hours and 515 miles. The computer average is 37.6 MPG. But that is elevated by the recent 7 hour trip at 43.3 MPG
So far I have only...
1. Average speed for the entire trip was 52.3
(381 miles/7.28hours)
2. No hurricane assist from Milton!
other:
I10, so flat road.
Fuel source unknown.
1/4 tank regular unleaded added to tank.
Presume starting tank was the same.
Speed of the traffic. 55-65
Obviously better...