The reason I asked the question about a dpf delete is that Mazda dpf implementation and software is sub optimal. Dealer software updates in about 2018 reduced the dpf regeneration frequency from 250 to 150 miles.. So over a tank of fuel the car regens 4-5 times, each time wasting 5-10 miles worth of diesel. Secondly, with an incomplete regen cycle, excess fuel makes its way into the sump and raises oil left which is never a good thing.Kube1010 wrote: ↑Thu Aug 04, 2022 7:34 am DPF Delete is just silly in every way. I've seen a lot of 'DPF Issues' highlighted by people who who should have never bought a diesel either because they don't do the miles or their driving pattern doesn't fit with DPF guidance. You can actively regenerated the DPF on a CX-3 - take it on the motorway and keep it at 3k revs or slightly above for 20 mins - on the media display under the fuel economy page, you will see the i-stop 'READY' and the three symbols on the right, Engine, AC, Battery, all with a blue glow round them - when the regen kicks in, the i-stop goes to 'NOT READY' and the blue glow around the engine symbol disappears - this lasts about 5-7 min. Best way I've found to do this is 65-67mph in 4th gear on the motorway and then back to normal 5th/6th when the regen starts.
Can't understand why you were getting 70-75MPG - that, IMHO is just not possible on combined driving, even with a heavier slant on motorway driving.
The dpf regens normally whilst driving. Why would I go looking for a motorway and drive at 65mph in fourth and waste even more diesel? I do drive with the fuel economy screen as the default on the MZD connect to monitor when a regen starts. Then I will drive normally for 10 minutes and it completes itself. If it happens in the last few minutes if a journey then I will make sure it completes on the next journey to minimise the number of failed regens and oil dilution. I have never had a dpf warning light since new.
Our Mazda 2 has done 66,000 miles over 6 years and was bought at a time when the government where supporting diesel through road tax and BIK benefits. Most of these miles where completed pre Covid and up and till then the car made perfect sense. Zero road tax, £150/year insurance and a genuine 65-70mpg make it a cheap car to own.
However the car is compromised by Mazdas poor dpf implementation and this has to be actively managed if you are no longer doing regular long journeys. It also has the potential to be a better car by remapping, removing the dpf and deleting the egr. These improvement would up the power to 130bhp, improve driveability and improve economy to over 75mpg. All the dpf problems would also disappear.
Morally, I know it’s wrong to remove a DPF but this happens to most dpf equipped diesels that are over 10 years old or have done over 120,000 miles. When the DPF becomes terminally blocked and owners face the choice of a £1500 bill for new dpf or £250 bill for dpf delete, most choose the second option!