70 MPG US (3.3 L/100 km) challenge (non-hybrid gasoline and diesel cars)

[California98Civic]

Originally Posted by 19bonestock88

I should’ve gotten a better pic for bragging rights, but I drove from Webster Springs, WV to Glenville, WV today. A trip totaling some 62miles, at an average of 71.5mpg indicated...

I was up to 70.2 indicated on my UG today (180 mile average), but climbing the hill to home put me @ 69.8. I got the pic that show I am getting closer!



This milestone will be fun, but the tank average will be harder. I am finding 70 mpg on the freeway to be really hard.

[19bonestock88]

At what speed do you travel on the freeway? My best results so far have come at 60 indicated (prob 63 actual) and EOC down any hill that will allow me to maintain or gain speed, which occurs at far less steepness than I could ever encounter DFCO and achieve the same fuel savings

[California98Civic]

Originally Posted by 19bonestock88

At what speed do you travel on the freeway? My best results so far have come at 60 indicated (prob 63 actual) and EOC down any hill that will allow me to maintain or gain speed, which occurs at far less steepness than I could ever encounter DFCO and achieve the same fuel savings

I had been doing 58 to 68 actual mph using P&G and EOC on the freeway, and I have recently slowed down the pace a little so that it's more like 55 to 65 mph. I don't always use those techniques, though and when I'm just a steady cruising I usually pick about 60 miles per hour are there actual or indicated depending on my mood. With techniques like those I can score into the middle sixties easily. The topping up over 70 poses a challenge. Hence the thread title!

[mpg_numbers_guy]

Originally Posted by California98Civic

...but climbing the hill to home put me @ 69.8.

This. I lose a good 5%-10% of my fuel economy on my 6.5 drive home from work due to a hill at the beginning of my road (2nd gear up to 30, then EOC to my driveway). Plus another 1 MPG up the hill into my driveway.

Originally Posted by 19bonestock88

At what speed do you travel on the freeway? My best results so far have come at 60 indicated (prob 63 actual) and EOC down any hill that will allow me to maintain or gain speed, which occurs at far less steepness than I could ever encounter DFCO and achieve the same fuel savings

55-60 MPH target, anything over 60 MPH is only if 150+ MPG is sustainable, anything over 70 MPG is EOC. 50 MPH up steeper hills when safe, and 35-45 MPH up long, steep mountain grades behind semi trucks. DWL always, no P&G.

[California98Civic]

Originally Posted by mpg_numbers_guy

... DWL always, no P&G.

So since last year when I installed my modified 15" MINI wheels for the weight, gearing, and aerodynamic gains, I have tended to do less P&G on the freeway. DWL is frequent, partly for engine cooling and power generation, too. I have a very tall VX/CX transmission with a 3.25 final drive, and with the 15-inch wheels I have freeway gearing as tall or taller than a 5MT G1 Insight. P&G is not as big a benefit as is it was. But that was when I was only planning for 55-60 MPG. Now that I'm trying to hit 70 and I have to drive the freeways I'm suddenly trying all kinds of stuff again. I want that 70 mpg "SRA" and a 70 mpg tank average.

[hayden55]

Originally Posted by California98Civic

So since last year when I installed my modified 15" MINI wheels for the weight, gearing, and aerodynamic gains, I have tended to do less P&G on the freeway. DWL is frequent, partly for engine cooling and power generation, too. I have a very tall VX/CX transmission with a 3.25 final drive, and with the 15-inch wheels I have freeway gearing as tall or taller than a 5MT G1 Insight. P&G is not as big a benefit as is it was. But that was when I was only planning for 55-60 MPG. Now that I'm trying to hit 70 and I have to drive the freeways I'm suddenly trying all kinds of stuff again. I want that 70 mpg "SRA" and a 70 mpg tank average.

Closest I get to png on 55-70 mph speed limits is putting the car into neutral on down hills when then cruise gets below 50% on the bar. Brings mpg up a couple mpgs. That and drafting big lifted trucks, suvs, semis etc...

[California98Civic]

Originally Posted by hayden55

Closest I get to png on 55-70 mph speed limits is putting the car into neutral on down hills when then cruise gets below 50% on the bar. Brings mpg up a couple mpgs. That and drafting big lifted trucks, suvs, semis etc...

A CVT is harder to hypermile in some ways, but I thimk your neutral coasting could be robbing you of deceleration fuel cut off (DFCO) benefits as well as free power from regenerative braking. What does "below 50% on the bar" mean? Sorry, never have driven a Prius.

I am here to claim my sticker picture for a "Single Run Average" ("SRA") of 70+ MPG:

[mpg_numbers_guy]

Originally Posted by California98Civic

So since last year when I installed my modified 15" MINI wheels for the weight, gearing, and aerodynamic gains, I have tended to do less P&G on the freeway. DWL is frequent, partly for engine cooling and power generation, too. I have a very tall VX/CX transmission with a 3.25 final drive, and with the 15-inch wheels I have freeway gearing as tall or taller than a 5MT G1 Insight. P&G is not as big a benefit as is it was. But that was when I was only planning for 55-60 MPG. Now that I'm trying to hit 70 and I have to drive the freeways I'm suddenly trying all kinds of stuff again. I want that 70 mpg "SRA" and a 70 mpg tank average.

P&G doesn't really help economy on an Insight at all, and hurts fuel economy unless done right, which I don't really have the skill to do. P&G worked wonders on the Civic with it's narrower best BSFC range. Plus, in a car that's been getting over 100 mpg lately, P&G sounds like too much work. Maybe I've gotten slightly lazy with my hypermiling when it comes to that. Or more than likely my P&G skills just suck.....I couldn't even get P&G to work on the Prius, and supposedly P&G is huge for mpg on a Prius.

Originally Posted by California98Civic

What does "below 50% on the bar" mean? Sorry, never have driven a Prius.

My guess is that he is referring to the regenerative braking bar indicator on the car - when the bar is more than 50% lit up (more than 50% of maximum regenerative braking) putting the car in neutral helps.

Originally Posted by California98Civic

I am here to claim my sticker picture for a "Single Run Average" ("SRA") of 70+ MPG:

Nice mpg!!

[Xist]

I am in! Someone tell me how to take my 20/27 Accord with an automatic from a best tank of 42.94 to 70!

Only another 63%!

Or someone hit me with a pool noodle so I put the bolt in my crankshaft pulley and see how my Civic is doing. I counted almost seventy tanks above 42.94 and four that were 50+.

I only need 40% from my best tanks!

[mpg_numbers_guy]

Originally Posted by Xist

I am in! Someone tell me how to take my 20/27 Accord with an automatic from a best tank of 42.94 to 70!

Only another 63%!

Or someone hit me with a pool noodle so I put the bolt in my crankshaft pulley and see how my Civic is doing. I counted almost seventy tanks above 42.94 and four that were 50+.

I only need 40% from my best tanks!

You should get your Civic running! If you're pulling mid-high 30s out of that Accord, 70s is within reach in your Civic!