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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. D

    Heatslave greenstar II 18/25 duel oil feed

    Hi all, Thanks for reading. I just picked up a 2015 greenstar 2 heatslave 18/25 oil boiler to replace my relic from the 80's (still a greenstar bit not up to the flow requirements and it's not a condensing boiler so not efficient). Obviously a used item, it has 2 oil feeds. My current boiler...
  2. R

    Locked out & smelling of oil

    Hi, we have Worcester Bosch heatslave external oil boiler 18/25 Boiler locked out. Pressure was below 0.5 so brought pressure back up. When lock out is reset the burner attempts to light but sounds like a bag of spanners and cuts out again smelling strongly of oil. We have plenty of oil & the...
  3. Nicjones

    Riello 2.2 rgb oil burner won’t start

    Hello all Our riello burner intermittently won’t ignite. However for some reason when you tap gently the oil pump it lights every time. Any help appreciated. Thank you
  4. C

    Oil fired boiler and additives?

    I'm new to oil fired boilers. The first time I topped up my oil tank, I had the supplier organise the additive. From now on, I will buy my own additives. Is there any particular type the oil engineers on the forum would recommend? Heating only, no aga ect.
  5. E

    new grants external oil fired combi

    Hi, is it ok to turn on and use new grants external oil combi boiler, before it gets commisioned next week ? or can this cause any damage at all, ? many thanks.
  6. D

    oil boiler overflow dripping

    Hi, We have a Grant oil combi boiler. Only 3 years old. Been a right pain. Already had expansion vessel replaced and the 3 bar PRV and another thing that I have forgotten name of, but it has a load of copper mini pipes is a square loop. Then when it was really cold the overflow started chucking...
  7. S

    URGENT Oil firebird not firing

    Firebird boiler not firing up oil getting to pump just not getting to nozzle. It's brand new
  8. S

    De Dietrich oil boiler manual

    De Dietrich oil boiler Looking for the manual or draiwings of the attached De Dietrich oil boiler. I will appreciate if somebody knows the model name. Thanks in advance. Sandouraki
  9. M

    Green plastic (Qual) oil line discontinued?

    Recently I needed to re-route very old and dodgy oil pipe from tank to boiler. I dug trench and laid a duct and the engineer used green plastic (Pipelife Qual-Oil?) oil line to do the job. Had cause to have boiler manufacturer out to look at something yesterday and he remarked that this Qual oil...
  10. D

    Grundfos noisy oil central heating

    Hi. We have a wolf oil central heating system, with a grundflos alpha 2 circulation pump. Sometimes it makes a tinkle noise ( like metal to metal) and sometimes not. With and without burner running. I removed pump and impeller is ok and clean. Bled system through. Nothing helps.
  11. Jock Spanners

    How do I bend oil pipe?

    Evening All, We've just moved into gas boilers (after years doing gas) and are currently tooling up. On our first install we had problems bending the 10mm plastic coated, white pipe. Possibly because of the sub-zero conditions the covering shattered when we bend it by hand. It measures 12mm...
  12. S

    Oil furnace not igniting, what can i do?

    Oil furnace not igniting, today my oil boiler tripped the central heating fuse, once reset the boiler needed reset on the furnace control box(no coloured light), once reset the boiler blower etc is running, but not firing, there is no heat coming from the boiler and nothing heating up. the...
  13. Crossfingers

    Oil boiler dripping hot water

    Please help Our Grant Vortex Pro oil combi boiler seems to have developed a drip from some sort of valve where it looks like there's a limescale build up. There is no water at all from hot tap and no pressure in the boiler. The heating works fine however. Is there something I can do or should...
  14. 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...
  15. 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...
  16. 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...
  17. 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
  18. F

    oil stick does not lower into tank on either tube

    Cannot lower stick into oil tank
  19. 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...
  20. 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...
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