Cruising Speed "Sweet Spot"? (for best fuel economy / MPG)

[Daox]

If you don't have a scangauge, you can usually feel when DFCO stops. You'll feel the braking / slowing down, and suddenly you'll feel yourself not slowing down quite as much.

[uheym]

I have a scangauge, but the explanation makes sense so I can find out when mine does the same.. but I think it will do I by the same Rpms ..

[deleted user]

To check DFCO engagement just leave it in 3rd gear, you will feel the fuel come back on around 1200 rpm.

regards
mech

[Mirage_Sydney]

Is it just me, or have others noticed that using air conditioning in hot weather can increase fuel consumption by around 25%?

[MetroMPG]

25% is on the high side. See this topic:

Thread: Air Conditioner Effect on MPG

Especially make sure you see post #28 where Yttrium ran a comparison test while cruising at highway speeds.

[M-88]

To check DFCO engagement just leave it in 3rd gear, you will feel the fuel come back on around 1200 rpm.

regards
mech

Apples to Oranges here as it's a different car, but I could never tell when the Focus would do DFCO until after I installed a polyurethane dogbone mount. Now I can absolutely feel the fuel come back on during deceleration.

[Mirage_Sydney]

25% is on the high side. See this topic:

Thread: Air Conditioner Effect on MPG

Especially make sure you see post #28 where Yttrium ran a comparison test while cruising at highway speeds.

Interesting thread. I haven't done a proper comparison, I just noticed that with the whole family in the car and the air conditioning and fan running at maximum on a hot day the readout tells me I'm getting around 7 L/100km, and I'm comparing that to driving by myself without the air conditioning on at all. I will do a proper comparison when I get the chance.

The fuel economy is getting better, filled up last night and calculated my fuel economy at 5.6 L/100km. Down from 5.9 on my last tank, and if anything I've been driving the car a little harder.