Please bear with me on this one.
Until this week I haven't heard of a DPF.
My last car was a 2010 1.4tdci Fiesta Edge, fitted with a DPF.
My journeys mainly consist of trundling around town with the odd motorway run. And I had the Fiesta for 2 years and 8 months, and the only problem I ever had with that car was the rubber seals around the fuel injectors. There was not any other single fault.
2 months ago, I bought a 2009 1.6tdci Focus econetic. Reasons being i can't afford to run a petrol car with the cost of fuel and tax.
And early this week, whilst doing around 60mph the engine lost a lot of power, and on the dash all that was displayed was "Engine Malfunction". I had no prior warning about this.
So took it to my local mechanic, and he explained the issue, and cleaned it and now all is well.
So I've done some reading about DPF's, and 9/10 people are saying to stay away unless you're on the motorway often, which makes sense considering how a DPF burns off the soot.
But I'm a little confused/worried.
My previous fiesta had 50,000 on the clock when I bought it, and I changed it at 60,000, and I never had a problem with the DPF.
And this focus has 86,000 on the clock.
So, what I would like to know, is,
1) Did I get lucky with the fiesta?
2) How long can a DPF go without cleaning just driving around town?
3) Will me taking it onto the motorway for 20 mins clear the filter?
4) If so, how often would I need to do a motorway run?
Also, I have read that to begin burning off the soot in the DPF, the engine revs need to be around 2,500rpm. Which is a slight issue, as the other night on the motorway for about 3 miles, at 70mph in 5th, the engine revs only hit 2,000rpm.
So, only hitting 2,000rpm even on a motorway, does that indicate that I have an "active regeneration", as opposed to a "passive regeneration'?
I'm aware fundamentally, I've made an error in buying this car, I only buy diesel to keep the cost down, with tax and fuel. I'm just wondering, will everything be ok, if I take it for a high speed run say every 2 weeks?
After discussing this with my father, he is under the impression that, I didn't have a problem with the fiesta, so it's likely that you will generally be problem free with the focus.
After paying £200 for the DPF clean, I'd like to help the engine/filter as much as I can, I also have to consider, that I have no idea how the car was treated by the previous owner.
Any help/advice is appreciated.