Drove 2000 RPMs on the highway for 1 hour

[rick3000]

Sorry, about not recalling all the facts, but the buildup I was referring to was a carbon buildup in the engine, that higher RPM's get rid of.

Here's the thread, and the long debate that goes with it:

Keep her above 4000rpm and she'll thank you for it every day.

[986chris]

so a couple of weeks ago I took the forums advice and started burning prem. in my truck. 03 silverado 8.1. so my commute is about 5-7 min. at 35 mph. my computer avg. mpg has dropped about 2 mpg since I started this short drive. when i,m driving it shows my instant avg is 6-8 mpg which seems odd given the low speeds. anyone help me clarify this, is the computer correct, or is the data gathered effecting the outcome. dosen't matter much since my fuel bill is now $25 a week.

[JCL12]

While driving slowly on the highway I've gotten 29.1 MPG from a 01 tip box. (Odometer mileage divided by gas fill). I would expect newer boxes to hit 32+ easily.

[Dr. Kill]

Yes, I have achieved 31MPG on the highway just by driving 65-70 in 5th gear without hard acceleration.

I am under the impression that one could attain better fuel economy with the top up and the AC on than with the top down and not running the AC.

[skip_168]

pffft... I got the extra 6 bux in fuel...

[Brucelee]

Originally Posted by Dr. Kill

Yes, I have achieved 31MPG on the highway just by driving 65-70 in 5th gear without hard acceleration.

I am under the impression that one could attain better fuel economy with the top up and the AC on than with the top down and not running the AC.

I believe that is correct.

Also, the Box CAN get very impressive fuel economy if driven in a certain way. Makes sense, a relatively small engine, light car. Nice to know it CAN be economical if one wants to.

[2000SoCalBoxsterS]

Originally Posted by 986chris

so a couple of weeks ago I took the forums advice and started burning prem. in my truck. 03 silverado 8.1. so my commute is about 5-7 min. at 35 mph. my computer avg. mpg has dropped about 2 mpg since I started this short drive. when i,m driving it shows my instant avg is 6-8 mpg which seems odd given the low speeds. anyone help me clarify this, is the computer correct, or is the data gathered effecting the outcome. dosen't matter much since my fuel bill is now $25 a week.

The only problem is that it's a GM product. I have a GMC Yukon something odd always going on with a GM vehicle.

[Brucelee]

Originally Posted by rick3000

Sorry, about not recalling all the facts, but the buildup I was referring to was a carbon buildup in the engine, that higher RPM's get rid of.

Here's the thread, and the long debate that goes with it:

Keep her above 4000rpm and she'll thank you for it every day.

Thanks. I will check it out.