Don't get me wrong, the Acid Head Hippies in the EPA who are cooking up regulations based upon Junk Science should be charged with Fraud, convicted, sent to Federal Prison and us Diesel owners should be able to make contributions to the prison tattoo artist so they could decorate the backsides of the Acid Head Hippies. As far as I am concerned the EPA Acid Head Hippies treat Diesel owners as bad as the Taliban treats women
Now that my Acid Head Hippie/EPA/Junk Science Fraud rant is over. As bad as the DPF is, it is pointing out some of the issues that Diesel engines have, many of them caused by oppressive Bean Counter Tyrants who hold the power over the Engineers preventing them from doing the job right the first time.
According to the Amzoil presentation I watched on You Tube, Caterpillar is in denial about their leaky injectors. Leaky injectors cause fuel economy to drop along with performance, plus carbon up the engine. Of course some of the carbon clogs up the DPF resulting in more frequent regen cycles. Onthehunt, stated a few months ago that Navistar will buy Caterpillar lower ends (maybe long blocks) and hang on their injection system with the controls. Caterpillar and Navistar have been buddies for a long time and slap each other's name plates on the engines they sell.
Another issue that is coming to light thanks to the DPF, is fuel aeration. Weather caused by vacuum leaks, foaming, or from dissolved air in the fuel; any aeration in the fuel causes the timing to retard and the spray pattern of the injectors to be screwed up resulting in poor combustion. Poor combustion results more frequent DPF clogging requiring more frequent regen cycles. More frequent regen cycles on engines that use the injectors do a post injection to fire up the DPF instead of having the extra injector in front of the DPF, dump about ~2 quarts of raw fuel into the oil. Amzoil does not like having unhappy customers, dug into the case, and brought this to light. Why did the Diesel engine manufacturers do the post injection trick instead of doing it right like some (most?) of the ORT trucks are doing and Duramax just started doing? The Acid Head Hippies in the EPA did not give any lead time on the '07 emissions regulations, that is why Jeep dropped out of the US market in '07 and the German companies took a sabbatical on selling diesel engines in the us for '07 ('08) until they resumed selling BlueTech.
There are fuel additives that help reduce fuel aeration on the market that work and reduce the DPF regen frequency. If I had one of these units and had to keep the DPF (many have bypass pipes installed with trick sensors) going, I would use a fuel additives to reduce aeration, plus I would have a good lift pump to pre-pressurize the fuel (force out bubbles), some type of air separator, try to have a way to get rid of the post injection, and go with an injector in front of the DPF.
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