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#1
01-03-2006, 10:30 PM
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Decreased Fuel Consumption
My '93 Suburban currently has 420,000km on original engine. I noticed a huge drop in fuel economy (almost double) and have since replaced the spark plugs. Fuel mileage is now 12.5 m/gal combined. Any thoughts?
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#2
01-08-2006, 09:03 PM
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Re: Decreased Fuel Consumption
well, with that many miles, I'm sure you have quite a bit of engine wear. The first place to start in a compression test.
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