2004 Mercury Grand Marquis Marauder 4.6l V8 Leather 57k Texas Direct Auto on 2040-cars

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Ford finds flex-fuel engine design plays big role in emissions output

How bad is ethanol for your engine? There's been a lot of debate on this issue as the US considers upping the biofuel content in the national gasoline supply from 10 percent (E10) to 15 percent (E15). The ethanol industry and some scientists say higher ethanol blends show no "meaningful differences" in new engines while the oil industry says ethanol creates health risks. Researchers working at the Ford Research and Innovation Center decided to take a closer look at how a wide range of gas-ethanol blends - E0, E10, E20, E30, E40, E55 and E80 - affected the emissions coming out of a flex-fuel 2006 Mercury Grand Marquis. To see the full report, printed in the journal Environmental Science & Technology, requires payment, but there is an abstract and Green Car Congress has some more details. The gist is that, "with increasing ethanol content in the fuel, the tailpipe emissions of ethanol, acetaldehyde, formaldehyde, methane, and ammonia increased." At least NOx and NMHC emissions decreased. The researchers say that the effects are due to the fuel and "are expected for all FFVs," but that the way that a manufacturer calibrates the engine will affect NOx, THC, and NMOG emissions. It's this last bit that's important, since the researchers found, "Higher ethanol content in gasoline affects several fundamental fuel properties that can impact emissions. ... These changes can have positive or negative effects that can depend on engine design, hardware, and control strategy. In addition to direct emissions impacts, higher ethanol content fuel can also provide more efficient combustion and overall engine operation under part-load conditions and under knock-limited higher-load conditions." So, as we head towards more ethanol in our fuel supply (maybe), manufacturers are going to need to learn how to burn it most efficiently.

Has the Mercury Marauder gotten better with age?

In the early 2000s Mercury desperately wanted to develop some edge for its brand – seemingly stuck between a quasi-premium, quasi-performance space in the Ford Universe. The Marauder is perhaps the most famous of the vehicles that resulted from those efforts, and is rapidly approaching Modern Classic status, today. Effectively a murdered out Grand Marquis with some updated trim pieces – what are company parts bins for, if not raiding? – the Marauder looked convincingly like a bad guy car. The 4.6-liter V8 under its hood that had been breathed on by engineers for a little more power, kicking out 302 horsepower and 318 pound-feet of torque from the factory. Not exactly Ferrari-baiting numbers, but it'd give your local cop's car a run for its money. Being a wild child of the last decade, of course our friends at MotorWeek had it on the program. What better way to test your mean-mugging muscle sedan than with John Davis' tanned and steady hands?

Junkyard Gem: 1991 Mercury Grand Marquis LS

Ford's now-defunct Mercury Division first began using the Marquis name in 1967, on a sporty full-size hardtop based on the Ford LTD, then began offering the Grand Marquis beginning in the 1979 model year. These big, boxy luxury sedans were replaced by big, curvy luxury sedans (on the same platform) starting with the 1992 model year, so today's Junkyard Gem is one of the very last squared-off Grand Marquises ever built. The 1991 Grand Marquis (or "Grandma Keith," as many refer to it today) looks nearly identical to its 1979 predecessor at a glance, just as the 2011 model doesn't differ much from the 1992 model. Ford saw no reason to follow short-lived fashion trends with its simple, sturdy rear-wheel-drive sedan. Only two Grand Marquis trim levels were available for 1991: the base GS and the (somewhat) upscale LS. The former listed at $18,741 and the latter at $19,241, which comes to about $41,494 and $42,601, respectively, in inflated 2022 dollars). This interior would have seemed comfortingly familiar to a 1968 (or even 1958) Mercury owner time-traveling to 1991.  This is the optional "full grain leather seating surface," which cost an extra $489 (about $1,083 today). Dig those opera lights! Air conditioning was standard equipment in the 1991 Grand Marquis and its wagon counterpart, the Colony Park. The engine is the good old pushrod 5.0-liter Windsor V8, which would be replaced by a far more modern 4.6-liter SOHC mill in the '92 Grand Marquis. This engine was rated at 180 horsepower. A four-speed automatic was the only transmission available. The early 1990s ended up being the last gasp for padded vinyl roofs being considered mainstream equipment on new Detroit cars; this one was called the "Formal Coach" roof and cost an additional 725 bucks ($1,605 now). Such roofs were still available on a few cars later in the decade, but their time had passed. Why would such a clean Grandma Keith end up in a place like this? That's easy: it got T-boned directly into the right front wheel, mangling the body and bending up the suspension. This damage might have been worth fixing when the car was five years old, but it's a write-off when it happens to a 31-year-old Ford Panther. 1991 Mercury Grand Marquis Commercial - Savings Ad The granddaddy of them all, and on sale in South Texas! Related video: 2008 Mercury Mariner Hybrid test drive Autoblog