No, that's not quite true. The greatest level of efficiency was achieved with Tier II engines. When the next generation of emissions controls was implemented, efficiency declined in the name of reducing Nox and particulate emissions. That's not an entirely bad goal, but the brute reality is that Tier III engines consumed more fuel that their predecessors. They have perhaps come to a point in tuning today that they have gotten that back, but at great sacrifice to engine durability. When you had a Tier II engine... they were the most durable, most efficient, and generally best performing seen to date. We have gone backwards in the last 15 years with the aim of achieving some rather questionable gains.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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