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#22 ·
PRJ said:
I've got 2 stations in town where I live that don't mix. One is a BP and the other is a Citgo. Both are owned by the same guy.
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BP I trust somewhat, but I dont do Citgo. Besides the fact that those are Chavez's babies, the quality isnt the best. See I have to run premium since the Uprev installed, so i try to get the best quality stuff I can at the best price.
 
#23 ·
BuckyBadger said:
I wouldn't worry about the ticket, I'd worry about dying:crying:
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Well you have to be aware of your surroundings or else its off to see the :grimrippe ...

Certainly not worth a lot of my concentration - at 100 feet you still net 11% so thats better than nothing.
 
#24 ·
faith+1 said:
Well you have to be aware of your surroundings or else its off to see the :grimrippe ...

Certainly not worth a lot of my concentration - at 100 feet you still net 11% so thats better than nothing.
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How can one be truly aware at 10' behind a semi? 100' sounds more like it.
 
#25 ·
chepdog said:
Also keep your tires aired up to manufacturer specs. If it says 44psi cold make sure you have 44psi cold in the morning not when hot after a highway cruise, alot of people dont really care about tire pressure, i see numerous people drive with very low tire pressure hurting their gas mileage. Just my $0.02 . :cheers:
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up to specs is 35 psi per the door jam sticker, 44 psi is the max sidewall pressure of the tire. You will get poor handling at 44 psi and can subject the tire to bruising if you hit a pot hole.
 
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#26 ·
roy365 said:
How can one be truly aware at 10' behind a semi? 100' sounds more like it.
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well at 10' you can be aware of the thing right in front of you, but not much else. It still would be a bit improbable to do this at freeway speeds and not get into an accident if the rig hits their brakes.

I dont suggest this as a method, nor do the mythbusters, of saving gas. Its just interesting numbers.
 
#28 ·
There are two main things that are holding your truck back when its cruising down the road (Assuming its weight is constant and not at driving on an incline). 1.) Road Friction 2.) Wind resistance


Road friction, that between your tires and the road, is much less than wind resistance. Keeping tires inflated is good because it will minimize the amount of drag they produce on the road. Along the same principles, thinner tires will get you better gas mileage because there is less surface area coming in contact with the grown and slowing you down.

Wind resistance is huge though, especially with trucks. The force against your truck is directly related to the frontal area. Whats interesting though is that if you look at the curve, it is not a linear relationship. For instance the HP required to move a truck 55 mph is not linear when looking at how much is required to go 70 mph. Its actually exponential because of how the formulas work out. Example using arbitrary numbers.

100hp req for 55mph
110hp req for 60mph
123hp req for 65mph
140hp req for 70mph
158hp req for 75mph
180hp req for 80mph

So I guess basically what I'm saying is all vehicles have this sweet spot based on their own aerodynamics and mechanical limitations. I'd recommend trying different speeds on the highway and finding your particular sweet spot because it is there.

Drafting works in nascar because the air comes off the back of one car and directly onto the hood of the next. This isn't practical though for regular driving and frankly is unsafe.

Driving behind semi's works because turbulent airflow is created by the semi and it is much easier for your car to pierce through that turbulent air as opposed to cutting through laminar, or settled air. I used to try driving behind semis on road trips but decided I would rather pay the extra money and see a little bit of the road and scenery.

Get up 5-10 minutes earlier. Drive a bit slow, don't feel as rushed, get less tickets, save money on gas. Its all good. :)
 
#29 ·
PRJ said:
Also remember a lot of our nations gas stations are using ethanol blend gas. This decreases gas mileage by 2-3 mpg. Couple that with speeds up to 80 mph and now you have a double wammy against your gas mileage.

Use non ethanol blended gas and keep the tach below 2k and your speed at 60 mph and you can achieve 19mpg. At least I have anyway. And thats with a 4x4 CC with Big Tow.
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10% ethanol mix is not going to give you 2-3 MPG less when full E85 is roughly 3-4 MPG less. And gas up quick with 100% gasoline. This year 10-15%Ethanol blend will be the regulation in all 50 states.
 
#30 ·
You have discovered sliced bread. Nobody and i mean nobody knows about this and nobody has made 3000 threads about it.

lower speed = less resistance, less gas = higher mpg.

but since i can always put in more gas but i can't get my time wasted on the road back, i'll opt for higher speed.
 
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#31 ·
tpower81 said:
Along the same principles, thinner tires will get you better gas mileage because there is less surface area coming in contact with the grown and slowing you down.
Doesn't tire pressure, tire stiffness and vehicle weight determines contact patch area? That is why too much pressure can reduce your contact patch with the road and also reduce handling. In the end, it is a compromise.
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#32 ·
HudsonValleyTitan said:
10% ethanol mix is not going to give you 2-3 MPG less when full E85 is roughly 3-4 MPG less. And gas up quick with 100% gasoline. This year 10-15%Ethanol blend will be the regulation in all 50 states.
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Unfortunately it does. I have tried it on all 3 of my cars (Titan, Camry & Civic) with the same results.

As of right now the owner of the 2 gas stations in town refuses to buy ethanol blend gas because he said the mpgs go down in his car as well. That could change though if it is mandated.
 
#33 ·
Wow...what I would give to average 15-16 mpg. In the winter, I only average 10 or less. Summer, I average 13. Best I've got is 16...EVER! And that was down hill with a tail wind on a low humidity day. Plus the planets aligned...
 
#34 ·
PRJ said:
Unfortunately it does. I have tried it on all 3 of my cars (Titan, Camry & Civic) with the same results.

As of right now the owner of the 2 gas stations in town refuses to buy ethanol blend gas because he said the mpgs go down in his car as well. That could change though if it is mandated.
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All of our gas here is 10% Ethanol blend. When we go down south, they only have non blended gas. It made no difference at all in my mileage. Sounds more like suggestive find rather than an actual one to me. Full Ethanol mileage is less though. But if you're still able to get unblended gas, I'd stick with it while you can. Its' days are numbered.
 
#35 ·
Just wanted to share with everyone my results today. I've got about 4k on the car now. I have done lots of freeway driving, most of the time i get about 14-15 mpg on the freeway average just around 70-80mph. Today i did a 25 mile trip on the freeway at 60 (cc on), i average 18.6 mpg... i was blown away. That's a HUGE difference.

How i will do this on a normal everyday basis i have no idea, but that's a difference of about 20%. Cool deal!
 
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