oil

An oil is any nonpolar chemical substance that is composed primarily of hydrocarbons and is hydrophobic (does not mix with water) and lipophilic (mixes with other oils). Oils are usually flammable and surface active. Most oils are unsaturated lipids that are liquid at room temperature.
The general definition of oil includes classes of chemical compounds that may be otherwise unrelated in structure, properties, and uses. Oils may be animal, vegetable, or petrochemical in origin, and may be volatile or non-volatile. They are used for food (e.g., olive oil), fuel (e.g., heating oil), medical purposes (e.g., mineral oil), lubrication (e.g. motor oil), and the manufacture of many types of paints, plastics, and other materials. Specially prepared oils are used in some religious ceremonies and rituals as purifying agents.

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  1. jzak

    Engine 4.2L I6 258 Oil Capacity?

    Could someone offer a definitive answer on the factory recommended oil capacity for a 4.2L 258 engine? I've gotten conflicting info. Some say it's 5 quarts, while others say 6. If I put in 5 quarts, the dipstick level sits right below the "FULL" mark. but If I put in 6 quarts, it s just above...
    • jzak
    • Thread
    • 4.2l capacity dipstick oil
    • Replies: 8
    • Forum: Drivetrain
  2. R

    Engine Engine oil from breather.

    I have an 85 with the 258. 84k actual miles. The jeep sat for many years. It runs well now, but at high RPMs engine oil is blowing out of the breather and gasket around the pcv. I’m thinking I need to replace the valve stem seals. Does this sound right?
    • ram137
    • Thread
    • breather oil pcv valve
    • Replies: 15
    • Forum: Drivetrain
  3. K

    Engine 258 il6 oil leak

    This is an amc 258 inline six. I want to make dead sure my RMS is the cause of my oil leak before I go through that again. The question I would like to toss out is, is there anything besides thevRMS that would cause a steady leak from the bellhouse casing under pressure. Jepp loses about a quart...
  4. R

    Misc. Noob maintenance

    The usual noob contentious questions: I Just acquired an 84 4.2l 6. A Few questions. 1. Part number for oil filter. 2. Recommended oil 100k milage efi. 3. Coolant recommendation. 4. Break upgrade recommendation. 5. Haynes or Chilton (or something else) for a maintenance refrence.
  5. N

    Engine 1972 CJ5 AMC 304 Oil Pan Gasket

    Anyone ever needed to substitute an oil pan gasket on an AMC 304. Living in Baja Mexico and parts are hard to find. I found this Duralast OS5210, but it only had one of the rubber ends and I think I need to drill holes in it? Might need to go back and buy the OS5215 they had to get a second...
    • Nick S
    • Thread
    • 1972 304 cj5 gasket oil
    • Replies: 0
    • Forum: Drivetrain
  6. H

    Misc. Oil Pressure Gauge Reads 0 until Warmed Up

    My 1983 CJ7 IL6 shows an oil pressure of 0 when it's cold, and then will jump up to about 40 once warm. I took the oil pressure sending unit off and tested the pressure with a gauge and it reads between 60-80 psi. I read that the sending unit might be bad, so I replaced it, but it still...
  7. R

    Engine Newbie to CJ7

    Hey everyone. I have so many questions lol. I figured this is the place to start. I am completely new to CJ7. I finally bought my first one it's a 1976 CJ7. I'm looking for fluid recommendations.I want to change all the fluids in the vehicle. All I know right now is that I have AMC 360 motor. I...
  8. Petescj

    Misc. Best garage floor cleaners?

    What have you used mostly to get up oil spots on your garage floor? I pulled everything out of my garage and pressure washed the floor but spots didn't come out as well as I wanted. Thanks in advance ☺️
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