Fuel mileage 90 Prado diesel? (3 Viewers)

[OM617YOTA]

Yes don't lug it, just don't shift like it's a gasser.

 

[VAcruiser]

That's definitely odd, the manual should be doing better. This is all purely guessing, but are you used to driving gasser manuals?

My auto has a "power" mode that doesn't give the engine any extra power, but extends the shift points out and lets the engine rev higher before shifting. I tried driving in this mode for a couple tanks of fuel because I preferred the shift points, and it reduced my MPG significantly. A lot more than I expected.

If you're used to a gasser and letting the engine rev, you might be shifting too late for best economy. Try shifting early and relying on the diesel torque, my auto shifts below 2000 rpms in normal driving.

I wanted a manual but got a fantastic deal on my auto. Maybe I accidentally wound up with the better option after all.

I've owned several diesels, a few of them being MT's. My experience there is subjective as the others have been VW TDI's that got 50mpg and preferred to be wound out. I personally think I have a vacuum leak somewhere that's skewing my figures.

 

[VAcruiser]

I'd suggest not shifting too early with a manual. At the very least get an EGT gauge first. The amount of heat you generate with a short shift can be staggering as you lug the engine.

I got around 10L/100kms the whole time I had my kzj90 (w/5sp) on stock sized tires. When I switched to 33s my consumption went up to about 11/100... But that was uncorrected for odometer difference so not entirely applicable.

Given my kzj experience, the very first thing I'd check on a kzj is the condition of the intake, since the EGR recirculates the oil gases and can do a thorough job of clogging things up. My truck had under 100k kms on it (under 60k miles) and was in extremely good shape but my intake was almost half plugged with oily carbon build up. After that, injectors?

This assumes correct tire pressure, no dragging brakes, and not being driven to excessive speeds, etc...

Ok, so this is exactly what I was thinking too. I'm thinking the stock tires are a little small for optimal interstate consumption (high MPH-Km/h). I'm thinking going up a size or two may actually help me out. I also intend to take the intake components apart and clean everything up soon. I'm sure that'll help.