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20th March 2022, 08:24 | #1 |
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Diesels and veggie oil
Just curious, does anyone know if the MGR BMW derived diesels will run on vegetable oil without any mods?
Edit: Ignore, just realised they're common rail so it's a no. Last edited by Bazzateer; 20th March 2022 at 08:28.. |
20th March 2022, 16:38 | #2 |
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For the curious, please could you explain why it being a common rail design makes a difference?
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20th March 2022, 17:29 | #3 |
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20th March 2022, 20:36 | #4 |
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My friend ran his R75 on a mixture of diesel and veggie oil. Didn’t have any problems in 30k miles. He only used new oil not used oil. 😉
Modern engines are a different kettle of fish but the older ones are fine. The old story was if unsure add a few litres to a full tank and if it works fine gradually build up your confidence and add more over time. |
21st March 2022, 10:07 | #5 |
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I looked into this many years ago. It puts too much strain on the high pressure fuel pump.
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21st March 2022, 17:52 | #6 |
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I think the issue is viscosity so some people used to fit a pre-heater
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21st March 2022, 18:00 | #7 |
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My old B4 Passat had the 1Z engine and loved fresh veggie oil. It had an 80l tank so I would buy 3 x 20l jugs of fresh oil from Costco for 55p/litre and fill it up, then top up with about 10l of diesel (which was about £1.30/litre at the time).
Ran smoother and quieter. 55+mpg. Smelt great. Only issue was in sub-zero temps when it would take a few extra seconds to start. Only sold it because I accidentally bought an E36 320i Touring. |
21st March 2022, 18:04 | #8 |
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I remember when it was that cheap but also when it went up over a pound a litre (wonder if that was related to people using it as fuel lol) so the difference in price with diesel wasn't all that. Now seems like an interesting proposition ...
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23rd March 2022, 13:58 | #9 |
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Be interesting to hear of anyone using veg oil in a 75 and what sort of combination, ie: 50/50 veg/diesel ??
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25th March 2022, 16:51 | #10 |
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