73shark

I know, I know. Keep it in V4 mode by always going downhill.
[sm=happybounce.gif]

fbickley

73, I think that is about it. But I've found if you use cruise control while on the highway, it does better than your led foot.

Z, Is penzoil fine? or is Mobil One that much better? I take it to jiffy lube for ease since it is in the parking lot of my office.

scott_mckinney

Hi. I prefer the Diablosport the best, offers the best mileage increase, performance, and custom tuning is available. www.gosmm.com when you are ready to order...

fbickley

Thanks scott. I will check it out. I am a novice tuner (on engines at least) though, so I'm still not sure if that is the right solution for me yet. It sounds easy though, so I'm still doing my research.

ZX1100F1

Pennzoil Platinum Full Synthetic 5W30 is fine and completely GM6094M certified but in most of the testing I have seen Mobil 1 edges it out a little bit but nothing to write home about.

On a Corvette though no Penzoil motor oil meets the GM4718M requirement and they all are filled with Mobil 1 from the factory; just FYI.

fbickley

Not pushing it like a corvette, so I guess it's fine.

Filled up with high test (although it was only Exxon), and my milage seemed to drop at first, then pick up. Going to use high test again to keep cleaning it out, but I'm still at 17 highway and 13 or lower in town. I'd like to get it up to 20 hwy and 15 intown, but not sure if more after market products will actually get me there. Do you have any thoughts on chips for efficiency over performance Z?

07summitwhite

My 07 Suburban gets 11.5 mpg, city and only has 2400 miles on her.

jazejeff

back to the original question!!! I'veHAD superchips andCURRENTLY have the edge chip and by far the superchip gets more mpg then any other by far diablo is the worst diablo definatly being the worst!!!!!

07summitwhite

Don't you think that if a "Super Chip" or anyother chip really did work for saving gas that GM and all the other auto makers in the word would add the chip to all there cars and trucks? I bet there cost would only be a buck or two? By adding the "Super Chip" to the Tahoe they can claim 18 city and 25 highway and not 15/20 like they do. It would seell more trucks if they got more MPG?

scott_mckinney

Hi. You talk about the Diablosport negatively. What did you not like about it? I am curious, because for more advanced users who want more tuneability, the Diablosport should be the best bet...