Decreased Fuel Consumption
awagland
01-03-2006, 11:30 PM
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?
aggiedave98
01-08-2006, 10:03 PM
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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