11
DAF
XF105 QUICK GUIDE
2. Stay in the green zone
Drive in the green zone of the rev
counter, also when accelerating and
driving up gradients.
• On level roads, ease off the
accelerator to let the AS-Tronic
gearbox change earlier, or change
gear manually.
• Change gear as early as possible.
Drive in the highest possible gear.
• Full throttle: 1,050-1,350 rpm*.
• Partial engine load stay at the bottom
of the green band.
• Tractive force at 1,400 rpm is the
same as at 1,000 rpm, resulting in
high driving comfort at low revs.
* rpm = revolutions per minute = engine revs
3. Prevent waste
Don’t accelerate unnecessarily and
don’t leave the engine ticking over
unnecessarily.
• Even a fuel-efficient MX engine uses
1.6 litres of diesel fuel an hour just
ticking over.
Additional equipment have an impact
as well:
• Auxiliary lighting or other electrical
equipment: 1%-3%.
• The airconditioning consumes: 2%.
• Auxiliary lights and bars on front:
3%-10%.
4. Think about your speed
Most speed regulators are set at 89 km/h.
But that doesn’t mean you always have
to drive at 89 km/h. Each 1 km/h slower =
1% lower fuel consumption. If you drive at
85 km/h maximum, you will save 5% fuel.
That’s as much as 1,500 litres or more
per annum! This means not only lower
costs, but lower CO
2
emissions.
5. Keep your truck
in top condition
An airmanagement kit account for
approx. 10% of the overall fuel
consumption.
• Check the roof spoiler: every 6 cm
to low/high = 0.6% higher fuel
consumption.
• Cover the load, get straps done up
tight; if possible, avoid resistance
with the load or equipment.
• Ensure that the tarpaulin is stretched
taut. Flapping tarpaulins cost fuel and
cause unnecessary noise.
Low tyre pressure (at 6.4 bar instead
of 8.6 bar) results in higher fuel
consumption by up to 5% and tyre wear
by up to 25%. Check the pressures at
least once per month.
• Incorrect axle alignment (tractor
and semi-trailer/trailer) can impact
consumption by up to 3%.
And naturally keep the truck or
combination in top condition by
timely and qualified maintenance by
an approved DAF service workshop.
Optimum lubrication and tuning result
in a 3% to 5% improvement in fuel
economy.
What can you do as a driver for the environment?
56073_DAF XF Quickguide Basis.indd 11
25-05-2009 10:32:07
