Re: Valvoline full service?
If you can do these yourself, it would be a lot cheaper, especially with the cleaner through the intake. They want something like $100 for the cleaner where as you can get a bottle of fuel system cleaner for the tank and a can of throttle body cleaner for somewhere in the neighborhood of $10. If you want an all-in-one item, 1/3 of a can in the intake, 1/3 of a can in the tank, and the rest in the oil right before an oil change.
For the above question to make a huge difference, your vehicle would be in some dire need of service but it will return the engine to it's original performance and fuel mileage.
Sgtsandman's Work in Progress
2011 Ranger XLT, 4X4, 4 door Super Cab. 4.0L, 5 Speed M50D-R1HD, 3.73:1, 8.8" open differential, Jason Pace cap
1999 Honda CR-V EX, RT4WD, 2.0L, 5 Speed MT, 4.56:1, open differential