This thread should not have ever reached a 2nd page.

Agreed, I have already stated that I don't know much about cars, but like anyone else, I know the basics...

I'm not judging any advice, I just take whatever I can get.

Not true. Below a certain rpm an engine loses efficiency under load. Bogging a MT car all the time will not get you better mileage.

Somewhere between peak torque and 0 there is a sweet spot where the extra mechanical loss from higher rpm and the higher efficiency from peak torque intersect. Most cars these days are geared to find that spot at 55mph. For V8's its usually 1500-1800rpm.

Why do people around here put words in others mouths in an attempt to argue? I never said anything about bogging a MT. Cars are under variable loads = they are called hills.

Generally speaking lower RPMS (not bogging) but like you say a "sweet spot" which generally is a lower RPM and not a higher one.


All I meant...

You quoted me talking about something different altogether and went off on a tangent about hills. What i said was still true. Maybe you should work on your wording a bit and people wont pick it apart or read too much into what you are saying.

My hill comment is referring to my original "variable load" comment. They are the same thing. Not being a smart ash but do you know what variable load is?

I don't think we are disagreeing with each other except you commented "not true" which I question.

What specifically did I say that you quoted is not true?

Just because a car is being its most efficient at peak torque that does not mean its saving you the most gas.

The engine may be more inefficient but since you are demanding so little of its power your MPG is higher. A lot of times you are only using a small percentage of the power available because thats all you need. The car can not operate at its peak efficiency because of variable load which can be a lot of things. Speed limits, hills, traffic conditions, even operating blowers connected to the engine like air conditioning.



Assuming that the engine is operating in its powerband and throttle is between zero and 80% of travel,the slower the engine is turning, the better fuel economy will be.So upshift early--fuel economy is always best in top gear.

This post was edited by said_aouita on Apr 10 2014 08:59am

You would report me for flaming. Need a shoulder to cry on?

dynamite drop in.

Care to make yourself look more childish?

Just drive the dam vehicle
.
keep records of before and after mpg. If you must, And tell everyone else to shove it. Could it help? Yes. But I'm most cases your going to spend $500+++ on intake and exhaust. How long before you break even?

Your variable load statement works both ways. What I was referring to as untrue was your statement that lower engine RPM=better economy. That is not always true, and you said it yourself.

Peak fuel economy for my diesel is 1400-1800rpm. It will easily roll down the road at 1200rpm without hesitation. Lower RPM, fuel economy is worse. It's possible. All I was saying. Anyone that has owned a 4cyl/5 speed ranger can attest to that.

This post was edited by FMX_89 on Apr 10 2014 01:05pm