Fuel Economy?
- Thread starter Spanktron9
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While premium might not result in a better value in terms of $1 spent vs mileage traveled, there is some misinformation here about premium like that it burns slower or has less energy content. It's actually quite the opposite due the ability for more compression, which ultimately will release more energy per unit consumed.
Elsie gets premium gas cuz she's worth it =)
...via IH8MUD app
...via IH8MUD app
Additives in higher octane fuel retard combustion which prevents pre ignition AKA pinging. If your engine doesn't ping with regular octane fuel there is no benefit to running higher octane fuel.
When we lived in Reno and did the bulk of my driving at and above 4,500' elevation I, after much experimentation, found running 87 octane was compression friendly. Now at sea level 91 octane seems to be better. Makes sense given the density of air difference.
Of course ethanol throws in its own curve ball...
But the word "economy" and Land Cruiser (petrol
) should never be used in the same sentence 
Of course ethanol throws in its own curve ball...
But the word "economy" and Land Cruiser (petrol
) should never be used in the same sentence 
When we lived in Reno and did the bulk of my driving at and above 4,500' elevation I, after much experimentation, found running 87 octane was compression friendly. Now at sea level 91 octane seems to be better. Makes sense given the density of air difference.
Of course ethanol throws in its own curve ball...
But the word "economy" and Land Cruiser (petrol
Ethanol is one of the biggest POS policies that the Government has ever pushed down to industry. E10 gas lowers MPG 3-5 % (I think more), can tear up engines that aren't specifically designed to run on it, and I'm sure after producing it and passing the cost down to the consumer the gas isn't any cheaper. I'm not sure about other states, but if you are in a metropolis in Texas, there is no E0 fuel available.
http://pure-gas.org/
11 seems low to me. Average in town for me is about 12.5 mpg and on the highway is around 17.5. Over the course of 10k miles I averaged 14.5 mpg.
That's on 285/75/16s with a front bumper and 1.5 inch lift.
That's on 285/75/16s with a front bumper and 1.5 inch lift.
Blame your local corn grower.
^ this and their collective lobbyists.
My 11 mpg is uncorrected for larger tire size, not that it makes much difference. I am curious how much the CA blend impacts things. @spressomon you moved to CA from NV, right? Have you noticed a difference?
I went from averaging 14.8mpg on stock 275/60-18 to 12.7mpg on the 285/75-16 and running boards removed. I did this right around the winterized gas nonsense, so I will see what I get come spring time. All in all I don't think that's too bad for a 1 inch lift and a much heavier/taller tire.
my 2 cents
bigger tires + added weight = not good fuel economy (good fuel economy !! not that such a thing exist for 100)
bigger tires + added weight = not good fuel economy (good fuel economy !! not that such a thing exist for 100)
My girlfriend drives a G55.... In the city she gets about 7-9. Drive a g wagon and you will feel like you drive a Prius
The only difference I'm seeing is an overall increase in my MPG. The last big trip to Utah, Denver, ABQ, etc. I generally averaged 14.5-15.5mpg hwy (4.88/"35" Toyo AT2) whereas most of the time prior I was getting 13.5mpg average. But I started using Shell 91 octane last spring too...
It's not so simple as days of yore when cars had a single timing map. Modern day ECU's are very capable of advancing timing for more dynamic compression to maximize efficiency (power) from higher octane fuel.
How exactly does timing effect compression?
This seems logical, but from what I've read it's not the best method. Better to accelerate briskly (not hard, but at a good rate) and get up to cruising speed than to linger under slow acceleration. I'm sure there's plenty of good debate on either side of this.
The other thing I try to do in all vehicles is to never feather the throttle when slowing but rather to take my foot completely off the gas. In the 100 if rpms are > 1100 fuel will completely cut off. There are arguments that this isn't the best method but if you're going to press on the brake anyway I fail to see where the counter logic applies.