Question about 2002 Chevrolet Silverado 1500HD
As this car is computer controlled if you use the high octane you should get better mileage BUT you need to use about 4 or 5 tankfulls to get the average miles per tankfull then decide wether to go back to 90ron .(as i only do long trips in my car,using the highest grade gives me about 15% more miles per tank....MY figures.)
Posted on Sep 16, 2010
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Posted on Jan 02, 2017
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