I have the smell In the car of exhaust fumes, 1.5 diesel 2016 so have bought various DPF cleaners driven 100’s of miles in low gear high revs but it’s still there , I have now booked it into Halfords for their 35 pounds maintenance clean(35 pounds) to see if that helps , but thought asking the question on here may bring up some ideas,like taking it off, cleaning manually, also is C4 low saps oil the way to go

Smelling exhaust inside car implies a leak somewhere on the exhaust system?
I'm not sure of the connection between the smell and any DPF cleaning requirement?
Whatever the engine, I'd say you need fault codes if any and live data (DPF differential pressure senor and soot loadings etc) rather than guessing, BUT first, if it's not a leak on a pipe, it could be injector seals allowing gases to leak under the bonnet?
I'd be checking that and hand over exhaust pipe to check for leaks on that?
Also whatever oil is recommended should always be used (is low SAPS not generic?)
Edit: likely link with "Service light" post:
https://www.fordownersclub.com/forums/topic/165931-service-light/

When these engines were first released by Ford and Peugeot, Peugeot used low SAPS oil but Ford did not. It was exactly the same engine!

In the real world, I don't think it makes much difference over the lifetime of the DPF. The engine shouldn't be burning oil anyway. The only difference with low SAPS oil is that it creates less ash for the DPF. Ash cannot be burnt in regen, so any ash that's created will be trapped in the DPF permanently. The downside of low SAPS is that it provides slightly less protection from wear, though modern engine parts are often coated with Teflon or similar to balance that out.

1 hour ago, Shearers said:

Smelling exhaust inside car implies a leak somewhere on the exhaust system?
I'm not sure of the connection between the smell and any DPF cleaning requirement?
Whatever the engine, I'd say you need fault codes if any and live data (DPF differential pressure senor and soot loadings etc) rather than guessing, BUT first, if it's not a leak on a pipe, it could be injector seals allowing gases to leak under the bonnet?
I'd be checking that and hand over exhaust pipe to check for leaks on that?
Also whatever oil is recommended should always be used (is low SAPS not generic?)
Edit: likely link with "Service light" post:
https://www.fordownersclub.com/forums/topic/165931-service-light/

It only does it in town driving nothing when on motorway driving also my mate said Ford is known for smell

In car when DPF Is blocked etc

2 minutes ago, Bigbullhead said:

my mate said Ford is known for smell

In car when DPF Is blocked etc

So what does he say is the cure? - is that the reason for the focus on "DPF cleaning" without any evidence that it is blocked - even though it may be of course?
I say it's usually a victim of some other fault that needs to be found and fixed, hence my request/suggestion for evidence/codes/live data.
Otherwise we are guessing, I'll give up and your mate or someone else on here can guess and fix it (sorry for the cynicism 😉)!

The only way exhaust smell gets into the car from a blocked DPF is by leaking past the clamp on the turbo.

It's not a Ford specific issue. My Golf does the same thing occasionally.

First job is to remove the heat shield and see if soot has been blowing past that clamp. If not then the DPF is not at fault. If yes then try tightening it before anything else.

Without seeing the car I suspect this is more likely to be an injector leak or a PCV leak. At motorway speeds there's enough airflow to dilute and hide those leaks, and they can smell similar to exhaust leaks.

I will Get it up On the ramps and take a look thanks for your input👍🏻👍🏻🤞🤞

No problem. All of those parts are at the top of the engine bay though. No need for ramps.