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What's the most efficient speed and or RPM for the diesels?
I've been wondering what point in the engine's and the car's speed that it is the most fuel efficient. I get the impression that it's right about the 2000-2500 RPM range in 4th gear going 45-50Mph. The car runs the smoothest, the AC blows nice and cold, and it just seems to really like 2000-2500 RPM very well.
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1984 190D 2.2 Auto 220k
2001 Jeep Cherokee Sport 70K
2004 Lexus RX-330 ??K
2005 Chrylser Crossfire LTD 6K
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