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  #1  
Old 02-17-2003, 11:03 AM
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Join Date: May 2002
Location: Irving, Texas
Posts: 80
Gas Mileage?

I've got a 98 e430 and took it for a road trip over the weekend. I averaged 27.4 MPG on the highway & got almost 540 miles from a tank of gas.... I was impressed, as this is better than my last car a 95 e320...... a V8 that get better gas mileage than a 6...... oh, the car has 56K on it, and I was thinking that around 60 K I would do the spark plugs and the O2 sensor... I'm thinking it may not be time yet.....
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  #2  
Old 02-17-2003, 04:06 PM
ILUVMILS's Avatar
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Join Date: Sep 2002
Location: New Jersey, U.S.A.
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Replacing the plugs is a good idea. Your car has four oxygen sensors though, but don't worry about it. The car will tell you (via the Check Engine light) when you need to replace one!
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Old 02-17-2003, 04:09 PM
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Join Date: May 2002
Location: Irving, Texas
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it's got 16 spark plugs..... I didn't know that when I bought it....... 4 O2 Sensors? ouch, thats going to hurt.... I'd still rather do perventive maintenance. I hate getting stranded. In other words, I'd rather do maintenance on my schedule than the car's....
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Old 02-17-2003, 06:00 PM
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Join Date: Oct 2001
Location: Canada
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Modern V8s usually have 4 O2 sensors, but only 2 upstream O2 sensors got involved in fuel injection and can affect gas mileage. 2 downsteam O2 sensors are only used to monitor Catalytic efficiency, they only bring up a check engin code/light when CAT efficiency is low.

27.4 mpg is quite impressive, the best gas mileage I got from my 92 400E was 9.5L/100km (24.7mpg) when highway cruising in summer, in winter, the best I can get is 12L/100km (19.5 mpg).
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  #5  
Old 02-17-2003, 09:00 PM
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Join Date: Dec 2000
Location: Mountain Island Lake, Charlotte NC
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That is impressive. I got 26.1 on the inaugural drive back with my of my latest purchase back from Lexington, KY. Its was an ebay purchase. 97 E420 70,000. I get around 20mpg in the city.
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