Cooking oil in place of Motor oil?

Not without a significant additive package. And I wouldn't use cooking oil as a base for engine lubrication. They are used for cooking for a reason.

Now as a substitute for diesel fuel, they should both be excellent.

Visit amsoil.com and read up on engine oils and why the oils you mention would be really poor substitutes.

You need to research more about the difference between oils. Motor oil (being synthetic or non) is engineered and designed to work inside an internal combustion motor. They also add additives and detergents to the oil to help keep internal parts clean and working correctly. Every time the fuel burns you leave behind carbon deposits. The oil helps to break down these deposits and they are then removed from the oil by the filter. They are also designed to hold up under high temperature. The internal temperature of the combustion chamber is often 1000 degrees or more. If they where to re-engineer the oil I am sure it would work with the motors. But they have already done that with synthetic based oils. Look at what goes in to them. I would never use normal Cooking oils, they are not designed for use in a tight tolerance motor. If you do try it I can tell you that with in the first 10 minutes of operation the oil would start to break down and cause the crank bearing to start rubbing. In 15 minutes the motor would completely seize. It's not nearly thick enough nor does is offer adequate protection.

I would not recommend using vegetable oil to replace any motor fluid.

Vegetable oils may not have the viscocity required to allow for efficient movement and combustion of the engine and can be a hazard in the operation of the equipment.

Smoke point of oil tells you how hot it'll get before it starts to smoke but as oil heats up it thins and the higher the temperature the more the oil begins to break down and loose its properties. Those properties may be the ones you need to prevent it from catching on fire.

Most people on this site don't know what they are talking about, the reason the industry switched to petroleum at the turn of the century is because crude oil is cheaper and makes more money for the oil tycoons, vegetable based oil was used in steam engines and gas engines first and when they switched to petroleum they had problems with extreme wear, so they started adding additives in the late 40's and 50's like zinc for wear and lead for smoother burning and higher octane, the only problem with vegetable oil is it will freeze at 32 degrees like water, so you can use it in only warmer climates.

i know diesal fuel can be replaced by cooking oil in the tank. However I don't know if those types of cooking oils would change for a cool to hot engine. I think they have some additives that change the viscosity that makes the oil flow better.. but I think its an interesting idea you should check around the internet to see if anyone else came up with this idea yet. Plus remember the cost of avocado and other vegetable oils isn't exactly inexpensive either.

No. There is more to oil than the smoke/flash point and weight. Oils ability to resist break-down under pressure and resistance to water absorbsion. Also, if you look at how expensive the oils you described are, it is less expensive to use motor oil, so maybe you would want to revise your question and ask if you could cook with motor oil, since it is so much less expensive and has a high "smoke point."

If you're going for performance, you might NOT consider these. Because cooking oils are made not to be efficient when it comes to vehicle use. It is possible if that's your question; but for you to expect not having trouble doing so is naive.

I think your idea is great. There's a lot research that has to be done though. Motor oils are still best for these have passed thru a lot of research so as to be good for your car.

unless you can get your hands on some additives to prevent deposits at high temps or breaking down over time, as these oils biodegrade, the answer would be no. however they are working on it and with these additives the vegetable based oils are performing better but as for regular cooking oils right out of the bottle i wouldn't do it

Not likely. It's unclear what the viscosity rating is of these other oils. If it is too low, metal will break through it and contact other metal, and goodbye engine. I sure wouldn't try it, unless you have a car you want to junk anyway.

In the superstore, fruits are usually selected much too soon. Some are rocks, many are bad. Some of the fresh vegetables are typical right (zucchini, onions, garlic, lettuce, greens, and a few others) so I'd have to go with vegetables.