A ANDREW323 New member Jul 24, 2008 #1 well im doing a tune on my jeep and im changing to royal purple motor and transmission oil and installing a cold air intake and pulstar pulse plugs , will that make any difference on my jeep on gas mileage or horse power , please help
well im doing a tune on my jeep and im changing to royal purple motor and transmission oil and installing a cold air intake and pulstar pulse plugs , will that make any difference on my jeep on gas mileage or horse power , please help