Thread: 2.2 Puma Defender Fuel Economy

Originally Posted by Zeros

...by the way, in the absence of a redline on the tacho, any thoughts?

governed at around 4500 i think, but it has an asthma attack around 3500 when the turbo runs out of huff and just pushes out black smoke

Just came back from a weekend down south towing our cub camper,11.45ltres per 100. Pat

Mine has a roof rack and get 11 on open road

My D90, now has 96000kms on the clock, running a roof bar, and a short roof rack, 285/75r16s, and a 150hp tune from BAS, I get around the 10L/100kms. The tune improved the economy buy around 1 to 2L I think. The down side of the tune is I think I tend to drive a little more spiritedly, so economy around down is a little worse, currently living in Brisbane where it's quite hilly it's been hurting the economy a bit. I don't drive over 3000rpm though, normally change at about 2500.

In saying all that I normally count on 12L/100km for a safety margin. I dont have the OBD2 hooked up so I have no idea about egt etc.

Has anyone noticed (maybe isn't just me and my imagination) when you drive for 700-800kms at highway speeds with few stops (so plenty of heat soak) does the engine power drop off? I've noticed it especially at 110kph. (yes I melted the mudflap) I've noticed it on the standard tune and the 150hp.


As a side note: Worst economy I've experienced was towing a series on a heavy car trailer, series was loaded with parts then loaded on the trailer with some extra put in the 90, and the roof of the series strapped to the roof of the 90. Then towed 350kms from Rocky to Mackay, holding the speed limit - fuel light came on in Sarina and it started spluttering as I got to Mackay. worked out to roughly 18L/100. Did a similar trip where I stuck to 100kph, but had a bit more weight on board and in the trailer and got a more healthy 15L/100km I think.

I get better fuel economy if I change gears around 3000rpm. Changing at 2500 causes the engine to labour slightly, using more fuel IMO.

Yep, 2-3000 is the range to aim for.

My 2.2 is getting 11.4Lt per 100 with RTT on top & 1ton trailer with hills, city & hwy.

Dave

My 2.4 gets about 10.5, rising to about 11.5 towing the camper.