Fuel Economy on 150 series diesel Toyota Prado

Interesting, thanks Steve. Our current vehicle likes to sit around 90-98km for best fuel economy. Drinks fuel considerably more at speeds above that.

Same 120 d4d, steel bar, spotties, always full draws, 2" lift, roof rack (not basket - must take the front facing off - all it does is advertise Rhino and create resistance) dual batts, steinbauer tweak. Around Sydney 12/100 sometimes more sometimes less.

Towing 2000 kg struggle to get below 15/100 maybe take that facing off.

The 150 with same motor is apparently tweaked a bit better but vehicle is, from memory 280 kg heavier.

Different injectors....... Not if it's a D4D.

Not so oc1.
The early D4Ds have solenoid-controlled injectors. Later ones, including later 120 series vehicles and all 150 Series, have piezo-controlled injectors. They are different part numbers, specific to VIN.

How did you change the injectors when the injector drivers and software for each vehicle is different plus one operates a 16 bit ecu and the later a 32 bit ecu....... The original 120 D4D injectors were non DLC and now supersedes to the DLC version, the 120 injectors are all a solenoid type and the DLC version offers nothing in the way of enhanced performance, the 150 uses DLC piezo type injectors......Not that I know anything about them!

Sorry Frank.... Misread your post.

Thought you said you had changed the injectors to a different type.

What i misread .......
" have a 120 Series with the same engine as your proposed 150, though yours will have been tweaked for better fuel economy with different injectors and a couple of other things"

Sorry.

No worries mate. It's so easy to do.

Cheers

Great information andoland, thanks a lot for that. Figures look really good. Amazing to see the simpson figures are basically what we are doing now for normal driving!

No worries.

We also went from a 90 series Prado to the 150 series, but our 90 series was a diesel.

I love my 150 series, it's a great vehicle - very capable, good on fuel, easy to drive around town (my wife mostly drives it), lots of safety features even in the base model GX. It several steps up from the 90 series in almost every way except for one - despite the considerable extra external size of the 150 over the 90 serires, the 150 series actually has a smaller cargo area. It's much bigger in the front and second row seat area - longer and wider, but behind the back seats in smaller. It's mostly the depth, ie. from the tailgate to the back of the second row seats. However, the 150 series GXL is considerably worse again because of:
- the 3rd row seats folding down making the floor about 100mm or more higher
- the massive intrusion from the 3rd row airconditioner and the 3rd row cup holders.
If you tour with a family and without a trailer like we do then cargo space is at a premium. Therefore I’d recommend that you don’t buy the GXL because you’ll lose a massive amount of space.
We have no problem going away with a family of 4, we’ve just had to learn to pack more efficiently and utilise every bit of spare space.

Yes the petrol is what's killing us, we want to go to diesel to be more economical, but it's also time to upgrade anyway.

We are just starting to look at what's out there now and will see exactly how much space there is, but of course that's an important feature. Luckily for us, for longer trips it's just hubby and I travelling. Kids are old enough to not want to come with us, which is good space-wise! In our current vehicle, for longer trips, we pull out the middle seats and have had a shelf unit made up which we put in there and that helps enormously with storage. We've been told that can be modified to fit a new prado so hopefully that can be done.

Thanks again

Think left field for a moment and look at the Isuzu MU-X.

It wasn't on my short list but I'm glad I added it.