Join Date: Feb 2013
Location: British Columbia Canada
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All older diesel engines were B100-compatible. Then standards set by both the Environment Protection Agency and California Air Resources Board, which came into force after 2007, required all diesel vehicles to meet stricter emissions. That meant diesel manufacturers had to reduce emissions of NOX and particulate matter to meet those of gas-powered cars. The way most manufacturers did this created a setback for the use of biofuels.
To get rid of particulate matter, manufacturers came up with what's called a DPF (diesel particulate filter). The DPF is placed in the exhaust system in front of the muffler and looks similar to a catalytic converter used on gasoline engines. It captures particulate matter in its inner core. Periodically, the DPF has to be taken up to high temperatures to burn off the soot it has collected. This is called regeneration. The idea is to inject fuel into the exhaust that has been vaporized, and when the fuel comes into contact with the DPF, it heats up and incinerates the soot trapped in the DPF. Squirting fuel down the exhaust? Gee….. what a great idea.
And here is where the pitfall lies for biodiesel. Most of the engine manufactures decided to inject fuel into the cylinders just after the cylinder fires and the exhaust valve opens. At this point, the fuel vaporizes and moves down the exhaust to the DPF and cleans it. But, Because biodiesel is denser than conventional diesel fuel (it has a longer hydrocarbon chain) and has a higher distillation temperature and boiling point, it does not vaporize as easily. Some of the fuel ends up adhering to the cylinder wall and runs past the rings, diluting engine oil & eventually causing damage to the internals of the engine.
If you are DPF deleted & the regeneration cycle is programed off then running a higher percentage Bio mix shouldn’t be a problem from that stand point.
However on the 2008 to 2010 6.4 powerstrokes , There was also a new Common rail fuel system with pressures up to +- 25000psi. This particular system used a K17 Siemens VDO (also sold as Continental) high pressure pump that has absolutely no tolerance for dirt or water. If Running higher Bio Diesel fuels, an upgraded fuel filtration system should be considered.
2010 F350 KR CCLB, mini max, H&S pyro kit, ARP studs, II 71/59 billet turbos, ported intake, ceramic BD 6.0 exh manifolds, ceramic stainless uppipes, SDP 4" ceramic downpipe, 5" MBRP stainless, sinister egr delete with intake elbow, 3" CAC cold side pipe, BD boots, AFE custom air intake, AirdogII, Mann&Hummel CCV filter.