Not bad so far. 5.0L V8s are not known for efficiency.

"OpposResidentLexusGuy - USE20, XF20, XU30 and Press Cars" (jakeauern) 06/29/2018 at 14:20 • Filed to: None

6

12

80 miles in and 26 MPG. Stuck in some construction traffic for a second.

Chariotoflove > OpposResidentLexusGuy - USE20, XF20, XU30 and Press Cars 06/29/2018 at 14:38

1

I can relate.

fintail > OpposResidentLexusGuy - USE20, XF20, XU30 and Press Cars 06/29/2018 at 14:39

1

I remember the M113 in my old E55 could do similar on long drives, it just loafed along.

City mpg was closer to 12-14.

OpposResidentLexusGuy - USE20, XF20, XU30 and Press Cars > fintail 06/29/2018 at 14:50

0

Apparently the M3 of the same year gets around 18 because 6 speed. E90M3  has experience

fintail > OpposResidentLexusGuy - USE20, XF20, XU30 and Press Cars 06/29/2018 at 14:57

1

A slushbox can be good for more things than many want to give credit.

OpposResidentLexusGuy - USE20, XF20, XU30 and Press Cars > fintail 06/29/2018 at 15:01

0

ISF gas8 whole heats too. Would have to be s corvette length top gear to get this high with a manual 

fintail > OpposResidentLexusGuy - USE20, XF20, XU30 and Press Cars 06/29/2018 at 15:03

1

My MB was only a 5 speed, but lots of very low rpm torque to compensate.

Current DD (E250 Bluetec) is a 7 speed, with as much torque in a 4 cyl twin turbo as the V8. 45 mpg is attainable.

Stephenson Valve Gear > OpposResidentLexusGuy - USE20, XF20, XU30 and Press Cars 06/29/2018 at 18:43

2

5 liter V8 mileage? Yeah... here are my current stats on my ‘17 5.0 Mustang, 6 speed manual :

That 30.0 MPG was a fluke. However, 27 can usually be had for just going the speed limit on the highway, as long as the ambient air temp is somewhat warm. City mileage can get in the single digits in stop-n-go traffic... but thankfully, I do very little of that.

It is amazing that a 302 cubic inch V8 can get in the 20's, especially with the power they put out nowadays.

Sparky Polastry > OpposResidentLexusGuy - USE20, XF20, XU30 and Press Cars 07/02/2018 at 01:22

1

I’ve never cracked 30MPG in the ISF, and I’ve done at least 100 LA-SLO 100% freeway trips being fair on the throttle. It’ll creep up to 26-27 for me on a distance of about 170 miles, so I guess if you’re running full tank to empty you could potentially hit 30.

I think my all-time greatest one of these trips involved 12.2MPG....that was a good driving day.

OpposResidentLexusGuy - USE20, XF20, XU30 and Press Cars > Sparky Polastry 07/02/2018 at 08:52

1

With no traffic we almost hit 27. Might be our  most fuel efficient vehicle

Sparky Polastry > OpposResidentLexusGuy - USE20, XF20, XU30 and Press Cars 07/02/2018 at 12:31

0

Sweet! Those kinda miles don’t make me feel guilty....I can tell from your dash pic you don’t have a 2008. If you’ve got 2012 or newer you scored the awesome suspension, too.

Although they are all the same fast...

OpposResidentLexusGuy - USE20, XF20, XU30 and Press Cars > Sparky Polastry 07/02/2018 at 12:35

1

I have a 2011 which was the first year of the awesome suspension .

Sparky Polastry > OpposResidentLexusGuy - USE20, XF20, XU30 and Press Cars 07/02/2018 at 13:17

1

We 2008 owners are in denial and don’t want to hear about it...

Michelin PSS made a huge difference in my car though...much better ride than the broke-ass Falkens that were on it when I bought it in 2013.