I have a 1997 Silverado K 1500 4x4, Automatic, 5.7 Liter V-8 / a 2003 Ford Taurus SES, 3.0 Liter V-6 (Standard motor, not overhead cam), Automatic / and a 1997 Ford Taurus GL, 3.0 Liter V-6 (Standard motor, not overhead cam), Automatic ---- I have always heard to put 89 or + octance gas every few tanks to prevent engine gum up, but I wonder about getting the best mileage also. --- (All vehicles have between 115,000 - 160,000 miles, with the truck only used for pulling a boat or hwy driving when it is used and cars are some hwy/ mostly city driving --- What octane gasoline should be ran in each of these vehicles to prevent engine problems, get best mileage, and not waste money neadlessly on higher octance gasoline? Please list each vehicle seperately for different octanes suggested.
have the same problem?
Sunday, May 22nd, 2011 AT 1:46 AM