I recently changed my oil to Pennz Platinum 10w/30 full syn. and gained 6/10 of a mile to the gallon. This has never happened to me before so I thought I would mention it and see if anyone had simular results.

99 1500 quad 5.9 (z) 4x4

 

penzoil is ****ty oil....your times were most likely due to better traction or colder IAT....

 

TB Spacers are a stupid mod.

 

HUH ???? your kidding right , penzoil oil is a good oil.. Going to a full syn will help the MPG some.. and 6/10 tenth of a mile sounds right , now change the axles to full syn and u mite just get 1 MPG gain , with the engine and axles...

And as far as traction or colder IAT , I still gotta say HUH ????

 

It sounds like he thought you were talking about 1/4 mile times or something rather than MPG's