retneprac said:
Bled through again twice, all seems good. Went for the MOT retest.
Still failed on emissions. What’s next after doing a few of the normal things, Italian service, oil fortify added with oil change, fuel treatment. Suggested to burn a couple of tanks of premium diesel?
What else could I try next?
Am I getting into piston ring territory or am I still looking at oil and fuel treatments? Emission test attached. Should I remove the sticker with the emission data?
Guess it could all be down to the egr being blanked?
Click to expand...
Try the premium diesel, and take it out for a good blast up the motorway, at least 50 miles.

You need to burn as much crud out of the engine and exhaust as possible before the emissions retest.

If in doubt that you are revving enough, keep it in fourth gear on the motorway.
 
The Italian service ( as in redline it in4th) recommendation was from another MOT garage (that the Fox went yesterday having been sitting about for year, it passed) off to refil with premium diesel.
 
No cloud at all. Tiny amount of black at low speed full throttle.
Wonder if an injector seal or 2 is on the way out?
Never had to top up oil though.
 
No cloud at all. Tiny amount of black at low speed full throttle.
Wonder if an injector seal or 2 is on the way out?
Never had to top up oil though
 
Turboman said:
Try the premium diesel, and take it out for a good blast up the motorway, at least 50 miles.

You need to burn as much crud out of the engine and exhaust as possible before the emissions retest.

If in doubt that you are revving enough, keep it in fourth gear on the motorway.
Click to expand...
premium diesel is just higher cetane rating ( combustion speed) dont waste yer money, use MILLERS ECO MAX diesel treatment, double the dose on 1/2 tank then steady 60mph till you need to refill, repeat job done.
 
KISSMYAURA said:
premium diesel is just higher cetane rating ( combustion speed) dont waste yer money, use MILLERS ECO MAX diesel treatment, double the dose on 1/2 tank then steady 60mph till you need to refill, repeat job done
KISSMYAURA said:
premium diesel is just higher cetane rating ( combustion speed) dont waste yer money, use MILLERS ECO MAX diesel treatment, double the dose on 1/2 tank then steady 60mph till you need to refill, repeat job done.
Click to expand...
clean yer injectors / valves better cleaner burn less crud emissions
Click to expand...
 
KISSMYAURA said:
premium diesel is just higher cetane rating ( combustion speed) dont waste yer money, use MILLERS ECO MAX diesel treatment, double the dose on 1/2 tank then steady 60mph till you need to refill, repeat job done.
Click to expand...
I have sometimes used Ecomax, it is pretty good stuff. The one I use now is called Marine 16.

The premium diesel is, as you say, higher cetane number then the regular diesel, but it also has a better additive package, so it is a bit like buying the fuel with the additive in it already.
 
Last edited:
Turboman said:
I have sometimes used Ecomax, it is pretty good stuff. The one I use now is called Marine 16.

The premium diesel is, as you say, higher cetane number then the regular diesel, but it also has a better additive package, so it is a bit like buying the fuel with the additive in it already.
Click to expand...
yea but i like to up the dose of the detergents and choose the level for the purge, i have used ecomax for 15 years now, its the only one of the 'snake oils' I have seen to have sustained impact, lol more to do with my approach to dose i suspect though !
 
kermit_rr said:
My understanding is that premium diesel is the same cetane as regular, it doesn't suffer pre ignition or knock on the same way petrol does

www.bumper.co

Are Premium Fuels Worth It? Premium Diesel & Petrol Explained

Is premium diesel worth it? Will super unleaded petrol benefit your car? Discover the answers to these premium fuel questions and learn more online today.
www.bumper.co www.bumper.co
Click to expand...
most are higher, some brands balance against detergent, but on average its higher across the main retailers / forecourts
 
KISSMYAURA said:
yea but i like to up the dose of the detergents and choose the level for the purge, i have used ecomax for 15 years now, its the only one of the 'snake oils' I have seen to have sustained impact, lol more to do with my approach to dose i suspect though !
Click to expand...
I use the additives with red diesel, which is the same as regular E8 diesel sold at pumps, but with a red dye and a chemical marker added.

When I was on the farm, I used to buy Ecomax in five litre tins, which I added to my red diesel bulk tank.

Now, I use Marine 16 on the boat, which also uses red diesel.

My additive use is mainly precautionary, my engines are very old tech, no DPFs, Cats, or EGR, and open crankcases.

But the additve helps prevent diesel bug, improves lubricity, and counteracts any impact of storing the FAME biodiesel for long periods of time.
 
Last edited:
anti diesel bug is a big no brainer for me...........i hear red ATF chucked in the fuel is popular for clearing out very old diesel engines stateside
 
KISSMYAURA said:
anti diesel bug is a big no brainer for me...........i hear red ATF chucked in the fuel is popular for clearing out very old diesel engines stateside
Click to expand...
There is some diesel bug in all tanks nowadays.

It isn't really a problem if your tanks have a high turnover of fuel, and you change your filters regularly.

In bulk tanks, boats, and anywhere the fuel is stored outside in steel tanks, it is likely to be more of a problem.
 
If the diesel treatment works on diesel bug then I need to get some. My vehicle doesn't do enough mileage to get a good diesel turnover so the bug could become an issue. So with that in mind, what brand/type is recommended and where is good to buy from?
 
Dr Strangeglove said:
If the diesel treatment works on diesel bug then I need to get some. My vehicle doesn't do enough mileage to get a good diesel turnover so the bug could become an issue. So with that in mind, what brand/type is recommended and where is good to buy from?
Click to expand...
Do you see any diesel bug in your filters when you change them? It is like a fine black dust, unless you use red diesel, in which case it will be purple?
 
Years ago, tanks had drain plugs, you could drain off the water sitting in the bottom! Without water, the bugs can't live
You're probably better off keeping the tank full so you don't get condensation etc
Regular diesel additives from halfords won't kill it, you need a dedicated product
 
kermit_rr said:
Years ago, tanks had drain plugs, you could drain off the water sitting in the bottom! Without water, the bugs can't live
You're probably better off keeping the tank full so you don't get condensation etc
Regular diesel additives from halfords won't kill it, you need a dedicated product
Click to expand...
That is right, the bugs breed on the film between the fuel and the water in the bottom of tanks. Fitting the old style water traps is quite a good idea. Land Rovers used to have them, until they were done away with for cost saving.
Obviously, they aren't any use unless checked and drained regularly.

These are the additives I use, the site is worth a read, they also make lots of water traps and fuel conditioning equipment.

www.marine16.co.uk

Fuel Treatment/Additives | Marine 16

www.marine16.co.uk www.marine16.co.uk
 
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