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An oil is any nonpolar chemical substance that is composed primarily of hydrocarbons and is both hydrophobic (does not mix with water, literally "water fearing") and lipophilic (mixes with other oils, literally "fat loving"). 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. E

    Smell of 'toasted sesame oil' from boiler flue vents. (block of flats)

    I live on the 3rd floor of a 6-story block of flats. (26 flats in total). During the evening when all people are inside their flats and using their boilers to heat their flats, there is obviously lots of steam coming out of all the different Boiler Flue Vents. if I open my window or go outside...
  2. L

    URGENT Drigging oil from burner

    Camray 5 (90A) (20 year old) oil boiler, had a noisy fan on the boiler so investigated, just a bit of dirt in the casing however, having removed the burner unit I replaced the Burner Nozzle no problem, old was very dirty and sooty. Found the boiler wouldn't fire up. SO rather than than mess...
  3. C

    Issue with oil fired central heating

    Hi. Currently experiencing an issue with our oil fired central heating system. When CH/HW is switched on, the central heating does not always work - the hot water does however without fail. We had the timer set to come on last night but alas, only the H/W came on. After a couple of hours of...
  4. A

    Rayburn with a BM oil controller with flexitemp goes out

    I have a oil fired Rayburn with a BM controller and flexitemp, installed for 10yrs +, which has developed a fault. It runs OK either high or low settings through the day but when left over night on low setting goes out ? Flexitemp seems to operate when tested Any help would be appreciated
  5. F

    oil stick does not lower into tank on either tube

    Cannot lower stick into oil tank
  6. M

    Oil Boiler gets too hot

    Hello everybody! I have little issue, and hope you will be able to help: I have very old oil boiler on conventional system. What happens is: When i turn central heating on, boiler is heating for about 1 hour, what happens at the end is pipes sound really loud(loud crackling sound) and overflow...
  7. old_gord

    Replace Stanley Oil Fired Cooker with Oil Boiler

    Hello we currently have an old Stanley range cooker in the kitchen and a back burner in the living room. There is also a hot water tank in the bathroom. The plan is to remove the cooker and plumb in a regular external oil boiler. Would it be fine to use the existing flow and return from the...
  8. W

    Oil Central Heating Switch

    I have an oil heating system, and also I have an open coal fire , the coal fire also heats the water through a back boiler and a neutralising tank , when the coal fire is on the water starts boiling, the only way i can stop it is to put the oil central heating on to circulate the water, is their...
  9. A

    Oil boiler fire after service

    Hi we had a recent service on our 40 year old Thorn oil boiler, we fire it up for the 1st time since the service todayfor got water, after 20 mins there was black smoke bellowing from the cabinet and flames inside. Going off the photos is there any obvious pointers to what went wrong? Thanks in...
  10. B

    URGENT Oil to gas conversion - Removing back boiler?

    Hi all, I am looking some advice regarding our renovations. We have just bought an old house circa late 1930's. We are looking to switch from oil to gas for various reasons one being the showers are electric. My question specifically regards a back boiler in one of the fireplaces. We have had...
  11. M

    Danfoss nozzle patterns

    Hi guys, I'm relatively new to oil and have a question regarding S/ES and H/EH nozzle patterns. I know that the ES/EH are specifically for kerosene but otherwise it appears that an S and ES are interchangeable. This has me wondering if its necessary to carry both, as it seems pointless to be...
  12. Stompi3

    Oil smell in room. Baby due soon

    Hi there. We have recently moved into a rental. We told our landlord and he says he can't smell anything. The boiler is in our spare room which we were going to make our due baby room in September. But I'm not too keen on putting baby in that room the smell it is only apparent when boiler is...
  13. T

    Oil heatslave 2 no heating

    Hi all , retired plumber here needing advice Just moved in to a house where a 1 year old green star heatslave 2 12/18 Geordie oil boiler is installed House has been empty for 5 months so technically the boilers hardly used Switched on pressure is fine , hot water fine but the heating is not...
  14. C

    Oil to Gas Boiler Conversion

    Hi everyone - Recently bought a house which is currently heated via FHW via an oil-fired boiler. Hot water is also provided by the boiler (via a tankless coil inside boiler). There are gas lines at the street, and the gas co is willing to bring gas into my house & install a meter for a $1000...
  15. G

    Oil smell on and off

    Hi again. Having successfully solved my secondary problem it’s now time to reconsider the primary fault. my boiler smells of oil, not always but usually. system is 25 years old and boiler is serviced annually. Metal tank in garden with Atkinson tank-master tap. Trianco boiler in utility room...
  16. B

    Oil Heating staying on when clock is off

    Hello, My heating is coming on when the clock is off and typically this has been a motorised valve failed but i have checked both valves, (i believe both replaced in last two years and the manual levers are solid i.e closed). Now what is strange is that full heat gets to the radiator closest to...
  17. J

    Oil burner boiler riello burner rdb HELP

    Hello alll, I have a firebird combi oil burner with the riello burner rdb in. It was working perfect up untill yesterday where it's going straight into instant lockout and won't do anything. Not fuel related because I can see it squiring out. Any guesses to what it could be ? Thank you
  18. J

    Run out of oil - lockout

    Hi all, I have recently run out of oil - the sensor in my kitchen is faulty so we’re completely empty. I’ve topped up my tank today to tide me over until delivery but my boiler (grant vortex eco wall hung) is still in lockout. I’ve read around and think I need to bleed the air from the system...
  19. R

    Help with oil combustion settings

    About 12 days ago attended a boiler lock out. Apparently another plumber was there a week before to and adjusted the photo cell. .. It is a grant wall 16/21 about 10yrs old. The ones where there is no room to move ...! Doesn't look like serviced much. Opened up and heavily sooted. Bottom baffle...
  20. L

    1st post here,which type of oil boiler -sysytem or heat only.

    Hi everyone-im a first time poster and after some info on what type of boiler to fit to my repiped house. I have an old large house which has currently got a 70kw oil boiler with a single pipe system and pipework is approx 4 inch threaded steel-mega inefficient with school type radiators-the...
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