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Originally Posted by euromodder
The very delicate current "high efficiency" crop can't handle alternative diesel-like fuels anymore.
Heck, mine has trouble with the mere 5% bio-diesel in our regular diesel ...
Especially the after-treatment systems are trouble-prone.
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After-treatment systems became really over-complicated, at a certain point that some Diesel users and enthusiasts started to question their real effectiveness regarding the overall operational footprint of a vehicle fitted with them.
workaround ideas to discuss among friends: Arguments against EPA witch-hunting regarding Diesels without mandatory emissions equipment
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Today's injectors will have trouble with even the smallest impurities in the fuel.
So will the high pressure pumps.
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That's why many WVO conversion kits have filters.
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How many common-rail diesels do you know that run veggie oils ?
How many of those have a diesel particulate filter ? - not that these do any good, on the contrary, but they're mandatory regardless.
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Volkswagen TDI and some French engines, most notably from Renault, still work reasonably with vegetable oil conversions. I know it's illegal, but some actually have the DPF removed and the EGR bypassed to work better with vegetable oil...