Did you know that short journeys are bad for the environment as well as for your car?

Regarding your comments about short runs by IC-engined vehicles, (and engines in general), you're absolutely right. Short (cold) runs are bad for the engine, but even worse for the environment. The ECU will hold the engine in cold start enrichment/increased low idle speed mode for a petrol, or afterglow mode for a diesel, and the catalyst will not reach "light off" temperature, so increasing pollution. Engines where the catalyst in very near to, or incorporated into, the exhaust manifold are a little better, but cannot cope with those who chose drive for half a mile or so each way. For a diesel equipped with a DPF, there is the added danger of engine/vehicle runaway if the practice is habitual. It could be, quite literally, lethal.

Asked on 10 February 2011 by HL, via email

Answered by Honest John
Could not agree more. In fact you have rewritten what I have written hundreds if not thousands of times over the last couple of years.
Similar questions
The time has come for me to think about changing my present vehicle, a 2009 Toyota Avensis D-4D 2.2 Tourer. Although the Avensis has had a fairly recent facelift I can’t help wondering how long it will...
One of the cars you have suggested is the Qashqai 1.6DCI, which I understand has a good diesel engine. However, as I stated in my query, I only do 12,000 miles a year and I have read (only yesterday in...
I read in a recent 4x4 review that the engine oil is quickly contaminated by the DPF. Is this the case on all diesel engines with a DPF, and can it affect the life of the engine?

Value my car

Save £75 on Warranty using code HJ75

with MotorEasy

Get a warranty quote

Save 12% on GAP Insurance

Use HJ21 to save on an ALA policy

See offer