 | Home > Puma (Tdci) > 2 stroke oil adding in dieseltank 2.2 Puma |
 
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| Huttopia Member Since: 23 Feb 2016 Location: West Midlands Posts: 1972  
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Hi- search is your friend, this topic has been done to death, dug up and done again, and again....
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10th Dec 2020 6:12pm |
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| Arlo Member Since: 05 Jul 2020 Location: Sterksel Posts: 12 
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 I will use the search, thanks! |
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10th Dec 2020 6:32pm |
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| Huttopia Member Since: 23 Feb 2016 Location: West Midlands Posts: 1972
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đnice one
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10th Dec 2020 6:39pm |
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| MartinK Member Since: 02 Mar 2011 Location: Silverdale (Lancashire/Cumbria Border) Posts: 2665 
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Fill your boots
https://www.defender2.net/forum/topic1708.html?highlight=2so I do use it, some don't, some swear by it, others say it's snake oil... Defender "Puma" 2.4 110 County Utility (possibly the last of the 2.4's) |
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11th Dec 2020 11:21am |
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| Julie Member Since: 07 Oct 2017 Location: Nantes Posts: 482  
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Hope this helps 
https://www.fuelexpert.co.za/2-stroke-oil-...-study.php However I like 2 stroke oil in my Vespa  |
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12th Dec 2020 5:48pm |
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| Arlo Member Since: 05 Jul 2020 Location: Sterksel Posts: 12
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Thanks for the artikel. Especially the DPF-life is not clear, so better to buy quality fuel like Shell, Total.
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13th Dec 2020 3:15pm |
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| Julie Member Since: 07 Oct 2017 Location: Nantes Posts: 482
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if you prefer clean fuel - without water / petrol dilution - yes - branded fuel will be a good choice.
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13th Dec 2020 3:24pm |
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| wynn153 Member Since: 30 Nov 2020 Location: Cheshire Posts: 31
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Adding 2 stroke oil to a petrol makes the exhaust smoky so would it have the same affect on a diesel, therefore clogging the DPF?
I'm no specialist but that's just my thoughts. |
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18th Dec 2020 6:26pm |
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3414  
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Petrol and diesel engines work somewhat differently.
In a petrol engine, there are sudden explosions, while diesel is a slow burn. Most probably in a diesel there is enough time for the oil to burn with the diesel. As with anything, there is varying quality of 2 stroke oil. There are 2 stroke oils that build up a lot if carbon also in 2 stroke engines, while others keep a very clean engine. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing 2012 90 CSW, 2.2TDCI, Santorini Black |
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18th Dec 2020 8:09pm |
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| mwestcrew Member Since: 09 Dec 2019 Location: South Warwickshire Posts: 251 
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I think you will find it is the other way round. In a petrol engine the spark ignites the compressed fuel and the combustion spreads progressively through the cylinder. (propagated flame front) whereas a Diesel engine has instantaneous âexplosionsâ caused by the compression.
At least that is my understanding. As for smoke as a result of using 200ml of 2 stroke per full tank, this would be minimal. Most 2 stroke engines (that do smoke) require a mix of in the region of 20-100:1. 200ml in 50 litres is around 250:1 2011 130 Utility Body 2005 110 Van |
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18th Dec 2020 11:55pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17372 
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Dinnu is right, in a diesel engine (or arguably a Stuart-Binney engine, but that is a different story*) the flame front is progressive as the fuel is injected in an atomised state into the hot compressed air in the cylinder, and it is the heat caused by the compression of the air that ignites the atomised fuel. The development and progression of the flame front is one of the most complex aspects of the Stuart-Binney/Diesel engine, and over the years there have been many forms, including separate combustion chambers. On of the key components to effective and total combustion is the provision of adequate "swirl" within the cylinder, and this has led over the years to some imaginative and complex piston and cylinder head designs.
In a spark ignition engine, an explosive pre-mixed fuel/air mixture is ignited. Again there is a flame front, but the flame progression tends to be faster (although I believe it is still technically a deflagration rather than a detonation). What actually happens in the cylinder is actually rather interesting! * The modern compression-ignition engine was arguably invented by Herbert Akroyd Stuart (and patented by Stuart and Charles Richard Binney for Hornsby and Sons of Grantham) in 1890, some seven years before Rudolf Diesel built his first working engine. |
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19th Dec 2020 12:59am |
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3414
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To add to Blackwolf...
Petrol engine uses the Otto cycle. In thermodynamics, it is also called constant volume because the explosion happens so rapidly the cycle creates a sudden increase in pressure, while volume is not changing. In a diesel engine, the cycle is called constant pressure. That means the pressure is constant while the volume is increasing (power stroke). That means diesel is combusting practically as it is leaving the injector for the duration of the injection. This is the main reason why you never hear about pinking in a diesel, and one of the reasons why diesel engines can make incredible milage. Back to the original subject, the sudden explosion in a petrol engine cools rapidly again, and might not give enough time for the oil to burn. Oil, and diesel are slow burning fuels, reason to why diesels cannot generate high rpm. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing 2012 90 CSW, 2.2TDCI, Santorini Black |
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19th Dec 2020 6:28am |
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