I noticed as recent as today that my MCS seems to have great throttle tip in and acceleration (non-sport mode) when my gas tank is almost empty. This is promising since I'm schedule to take the Mini in because I feel the acceleration has not been what it was since I puchased a month ago.

What are the benefits of burning the tank low?

 

 

Spending a great 300bux on a new fuel pump.

 

I burned the tank low to get some bad gas out of my tank. Then I filled up with Chevron Super and put a bottle of Techron in.

 

Maybe it feels better because its lighter that way .

 

That's exactly what I was about to say! My Outback is always zippier when the tank is low. It's not a good thing though!

 

Or maybe it's because it's in a hurry to get to the gas station.

 

Good to hear that your car feels stronger again

I don't know of any benefits of burning the tank low except less weight ~6lbs per gallon. However, as many others have said, you can burn out the fuel pump prematurely if you run it low on a regular basis.

 

I never go below 30 miles like the manuel suggest. I have 50 miles to go on this tank.

Also, thinking about the power issue. It's very HOT in Dallas, Texas. I heard that heat does effect the power and efficiency of turbocharged cars. Anyone heard that?

 

I cant believe I just read this thread. good grief

 

heat is the enemy of engine power regardless of if the engine is turbo or naturally aspirated. however turbo/super charged engines do suffer worse due to the nature of turbo/super chargers. since they are designed to pack in more air by compressing it, the hotter, less dense air will decrease power.

 

A 13 gallon tank will hold about 100 pounds of fuel, so a nearly empty tank would affect the vehicle acceleration. I don't think it would be that big a difference, but you may be able to notice.