What Octane?

[SinJin]

My best MPG is 17.2.

That's nearly all freeway driving @ 65mph+.

I run 87 Octane.
No mods on the VX.
My engine has 145K on it now.
I use 5w 30 Royal Purple oil and it's changed within every 5K miles max. As often as 3K.
I ran Michelin summer tires (Latitude Sport IIRC) @ 35psi during my MPG checks.
Air Filter was new during the MPG checks.
No tune-ups in the past 50K.

*EDIT : Also, I only drive using the Power Drive selector.

[RedBlur]

I was just wondering what type of gas mileage people were getting during my road trip yesterday. I ended up at 19.3 MPG using Shell 87 gasoline, although I was probably closer to the 20MPG range before I sped up from 70 to 75MPH. That was about 90% highway miles. I'm lifted and have oversized tires, so that isn't helping my mileage any. I'm also throwing an EGR code, but I tend to ignore most EGR codes I get unless the engine doesn't seem to be performing well.

I thought that was pretty good considering that my VX was sitting for the better part of 3 years, although I did help it out a bit with a fresh oil change and injector cleaner. Definitely better than the ~8 MPG I got for the first few miles I had it on the road... I probably needed to get through the old gas.

I bought a gauge a while back that hooks up to the OBDII port to monitor MPG as well as other vitals. I need to calibrate it because the gas consumption numbers aren't super accurate (seems to be about 5-7% low), but it is nice to use as a comparison and to monitor driving habits. Maybe I'll throw some 89 or 93 in it on my way back and see how it compares.

[vp277]

There are more efficient newer vehicles out there, I think what counts with the VX is fun per gallon and the fact that you're driving a unique vehicle. Lousy mpg is a small price to pay...