Master list of 65+ proven mods for increasing MPG

[Zolar1]

Originally Posted by Andyman

I found a couple of mistakes.

1) Advancing ignition timing: If you increase power without increasing fuel flow, you will decrease the BSFC, not increase it. The goal is to minimize the BSFC, which is a measure of the amount of fuel used to do a certain amount of work.

2) Hot / warm air intake: I think that a higher air intake temperature will increase the heat transfer through the cylinder walls because of the increased temperature difference between the air and the cylinder during the power stroke. Also, hot intake air doesn't change ignition timing unless the engine starts to knock (or ping) and the engine is equipped with a knock sensor. If the engine is not equipped with a knock sensor then somebody may need to retard the timing to eliminate knocking. You may want to mention that power will probably go down with hot air intake because of reduced air density.

On newer vehicles there is what is called an IAT sensor. It measures incoming air temperature and helps the computer adjust the ignition timing. Hotter air>retarded timing>better fuel economy.

[slowmover]

Originally Posted by 1337

From the "65+ Efficiency Mods" page:
There are a few threads that discuss synthetic or lower-weight transmission oil. Has anyone experimented with thinner oil in the differential of a RWD car?

Consult with MICROBLUE RACING.

[Zolar1]

Originally Posted by slowmover

Consult with MICROBLUE RACING.

What does that have to do with the IAT sensor? I just take mine out of the air duct and let hot air blow on it from the radiator. Works like a champ and it is free.

[SOUL-DRIFTER]

This is a long thread and sorry if I missed it ...but. Added help to fuel economy is keeping a good slippery wax job on the body.
Engine friction reducers like MT-10.
Put added insulation around your oxygen sensor.
For some vehicles like my Ford Aspire adding 2 ounces of Acetone per fill up. This boosted my fuel economy by 4mpg.

[Frank Lee]

I can't decide if you are malicious or naive.

[SOUL-DRIFTER]

Neither, is the correct answer.

[2000mc]

gives me an idea though...

if you have a car with a heated oxygen sensor, would turning on and leaving on the ignition for 10-30seconds or so, and then starting the car, help you get into closed loop faster?

[Frank Lee]

It's Louis LaPointe's 3rd (or 4th?) incarnation! So it's not "neither"; it's "both". Tell us about the year 1973, when "Free Bird" was the top song again. Please???

[jtbo]

Originally Posted by 2000mc

gives me an idea though...

if you have a car with a heated oxygen sensor, would turning on and leaving on the ignition for 10-30seconds or so, and then starting the car, help you get into closed loop faster?

No.

For closed loop you need to have engine temperature at normal operating range, oxygen sensor is heated up well before warmup phase of engine is done.

Even more if you have heated oxygen sensor, which most cars probably have today.

[SOUL-DRIFTER]

Wrong again.
Geeze, can't you get anything right?

Are you a mechanic or some hillbilly farmer like your picture indicates?

Reducing friction internally and externally really does effect fuel mileage, but I guess if you spend most your life on a farm tractor you would understand such complicated things.