They need to burn out the 'ash' somewhere, typically on long
higher-revving journeys, given the 50mph stretches of the M4 are where
it passes through urban areas, I suppose it might help to not inject the
extra diesel to superheat the DPF in those areas, but it's not as though
it happens all the time the car is at motorway speeds.
I was just about to make that very point. Unless the additive means that the
DPF will require less regeneration from now on for some time in the future,
you'd be better off burning extra fuel than buying the more expensive
How frequently (eg mileage or amount of fuel used) does a typical DPF need
regenerating? I ask because I've never been aware of it happening when I've
been driving - there's no temporary change in performance or warning light
on the dashboard.
Do the RedEx etc additives have any other effect than regenerating the DPF?
I think I once bought one that claimed to clean the fuel injectors of any
buildup of crud - that was for my first Pug 306 (1.9 turbo diesel as opposed
to 2.0 HDi) which started hiccupping on gentle acceleration, and the garage
recommended a bottle of it. They were about to put in some of their own
stock - and charge me more than the Halfords price, so I said I'd get it
myself ;-) That was long before diesel cars had DPFs and pouches of urea -
probably mid 90s.
Just one of those additives and they claim it reduces fuel
consumption and it likely does with the engines which
measure the pressure across the filter and burns fuel
to burn off the soot in the filter if it actually burns
off the soot itself instead so that isnt triggered.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.