20 mpg on v6?

[bkscott]

Is it possible that they have switched over to the Winter Blend Gas already, and that is why your mileage is dropping?

[TommyTheCat]

Originally Posted by sspolo

That's weird then. I do step on it at times, but I was sure I had to get good mileage on the freeway. I'm gonna reset the MPG when I fill up again and will drive really conservative to see if I can get better mileage.

Fill up with 91 or 93, whatever you can and while you're driving steady at 60 reset it and see what you're getting. Just keep on the freeway at that speed for a good 10 minutes see what you can get... If I do that, I get about 50. Which of course is not true, you waste the most gas turning on the car and in stop and go traffic. I usually drive city and I get 19.4 ish

Freeway I reset the trip right before I turn on the car for good trips and I will consitently get 33-28 ish depending on the drive.

[benjamin.i.campbell]

Originally Posted by fp115

Firstly, rim size does not matter. The wheel manufacturer should not matter in most cases. The PSI depends on the car's ratings.

Secondly, I am running 20s, I have an SS/RS. The rating on the door says 36 PSI. The 2014 I just bought, with dusk 21" rims also states 36 PSI.

The rating provided by the manufacturer, GM, is the minimum PSI. Essentially the PSI you will run cold. It will go up as you drive. Anything other than 36 PSI cold will not get you the best results.

You sure bud? When I got my oil changed at the chevy dealership a couple months back they recommended 38-40

[TommyTheCat]

Whatever tires you get will say what the maximum rating on the tires is for PSI... Don't exceed the max. If you're looking for better MPGs, although you will hardly notice a difference at all, then you want higher pressure. Your tires will last longer this way

If you run less tire pressure, you will have more traction and therefore burn the tires out sooner...
But never run them right at the max. You'll blow the tire out easily

[fp115]

Originally Posted by benjamin.i.campbell

You sure bud? When I got my oil changed at the chevy dealership a couple months back they recommended 38-40

Yes I am sure. Check the inside of your door and the owner's manual for further proof. The dealerships seem to err on many things. They told me 34 PSI, since most cars are 34. They always took air out of my tires whenever I went in. I had to report them to GM until they realized it was actually 36.

[fp115]

Originally Posted by TommyTheCat

Whatever tires you get will say what the maximum rating on the tires is for PSI... Don't exceed the max. If you're looking for better MPGs, although you will hardly notice a difference at all, then you want higher pressure. Your tires will last longer this way

If you run less tire pressure, you will have more traction and therefore burn the tires out sooner...
But never run them right at the max. You'll blow the tire out easily

If you go above the 36 PSI rating, your tires will NOT last longer. You will get uneven wear. The middle of the wheel will wear more than the rest of the wheel. A result of inflating above recommended by Chevrolet also results in a loss of traction.

Inflating to 36 PSI will give you the most even wear. The longest thread life. The best traction possible.

[redleader]

So, that's 36psi cold, when you get in your car on say a 12 degree Celsius morning?

[fp115]

Originally Posted by redleader

So, that's 36psi cold, when you get in your car on say a 12 degree Celsius morning?

If it is that cold out, your tires should be 36 PSI when you start your car. When you get temperature swings as great as that, this is where nitro is so much better... unless you are like me and have a compressor at home and don't mind adding or removing air as the temp changes.

[benjamin.i.campbell]

Originally Posted by CreativeDawn

I average about 28.9 to 31.00 if I recall correctly. I was on 280 on a decline/downward drive, kept it in Neutral (hyper drive) and I went all the way to 94.2 MPG....I was laughing at that point

Hmmm. Only 94? Your flux capaciter myst not be working correctly.

[191185]

Originally Posted by richard200593

I do allot of highway driving and I've always averaged 20-22 mpg In my v6. I've always felt it was a bit low but I do have exhaust and intake so I blame it on liking the sound at wot.

Not normal. lowest I get is 25 in city. 32 on highway

[Tigerfan]

Originally Posted by 191185

Not normal. lowest I get is 25 in city. 32 on highway

I would love to get those numbers. Even with stock wheels and tires i couldn't get that.

[Homer2]

I'm getting 9.9 l/km.. which is 23.7 mpg... a lot of slow freeway crawling also.. so I am pleased.

[DSX_Camaro]

Originally Posted by Tigerfan

I would love to get those numbers. Even with stock wheels and tires i couldn't get that.

Stock wheels and tires are your problem. Get lighter 20's or smaller with good tires (Goodyear, Michelin, etc) and it'll help.