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Thread: Oil

  1. #1
    Regular Member lborob17's Avatar
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    Default Oil

    Thought I would do an oil change - so after much talk here I went to the vauxhall dealer and bought some of oil and a filter (3.2 petrol) to give my car a christmass pressie

    Observations:

    Oil I got given is 10 40 semi synthetic - I questioned this as I thought it was thinner - - but I was told by the service manager that they use this in all the petrol engines.

    Filter - is not a cartridge throwaway type - - its like a airfilter (seems old fashioned to me!) so can anyone give me any advice on how to change it??

    cheers Rich

  2. #2
    Regular Member nutron's Avatar
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    Vehicle : Vauxhall

    Trim : very

    Engine : Z19DTH

    Year : Nosey

    Default The oil they gave you sucks big time!

    But it is what they use as it is cheap as chips.

    You would be better off getting a thinner oil for yourself. The manual says you can use other oils and they can improve both power and fuel economy.

    As for the filter, you will have to locate the oil filter housing and unscrew it. Then remove and discard the old filter and stick in the new one, just like that. You should realy replace the o-ring seals too at the same time which usually come with the filter.

    As to where the filter housing is, I'm not sure...sorry.

  3. #3
    Regular Member Gsi3.2's Avatar
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    Default

    Filter housing is located on the front of the engine, In between the exhaust down pipe and the gearbox. It's an alloy casting with a hexagon on the end for your spanner/socket. Mine was blo#dy tight to start with. Dirtier job than with steel canister filters.

    Filled mine withthe fully synthetic long life oil..10w40 semi is VX's 2nd string oil now.You can use it though if you wish,

    As Nutron said, Don't skimp on changing the 'O' rings either..It WILL leak..sods law etc..

    Then sit back in the knowledge it was done right fist time eh ??

  4. #4
    Professional Trader oilman's Avatar
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    Vehicle : Posche

    Trim : 928 S4

    Engine : 5.0

    Year : 1989

    Default

    5w-40 synthetic is a better option quality-wise.

    Cheers
    Simon
    oilmans website : www.opieoils.co.uk/
    e-mail : oilman@opieoils.co.uk
    tel : 01209 215164

  5. #5
    [Ex]Admin Duncan's Avatar
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    Default

    The oil that VX recommend is a 5W-30. That's what I got (synthetic) when I did my oil change (along with How 2). They shouldn't be giving you a 10W (the dealer) as it won't give you the protection from cold that a 5W does.

    EDIT: Correction. The 3.2 alternative grades recommended by Vx are 10W-30 and 10W-40. According to the manual, all petrol Signums are delivered with 0W-30 and all diesels with 5W-40!!

    D

  6. #6
    Ex Vec-C Admin ed taylor's Avatar
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    Vehicle : Vectra Estate

    Trim : Elite

    Engine : 3.2 V6

    Year : 04

    Mileage : 000

    Default

    Does the expense of mobile 1 0-40 warrent it. i used to put it in my vectra b, mine is due for it,s first service soon, and i was thinking of giving the dealer some mobile 0-40 to put in, i have allways thought it to be the best oil you can get.

  7. #7
    Professional Trader oilman's Avatar
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    Vehicle : Posche

    Trim : 928 S4

    Engine : 5.0

    Year : 1989

    Default

    There are equally good oils as Mobil1 out there, Motul, Fuchs are just two.

    Yes in the long term if you are intending to keep your car it pays.

    Cheers
    Simon
    oilmans website : www.opieoils.co.uk/
    e-mail : oilman@opieoils.co.uk
    tel : 01209 215164

  8. #8
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    Default

    if you give any oil to the dealer chances are he will not use it and keep the good stuff for his own car - thats whats happened in all the garages ive worked in.....

  9. #9
    Regular Member blr123's Avatar
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    Default

    If you want to know anything about oil then Simon at Opieoils is your man

    I think I'm rite in saying that the 5 = -30deg, 10 = -25deg, 15 = -20deg etc is the temperature at which the oil maintains it's fluidity i.e. cold start protection and the 30, 40, 50 etc indicate the pour factor i.e. how long it takes to pour a certain distance but I'm sure Simon will correct me if I'm wrong.

    Also there was a discussion about this on another forum during which it became clear that some manufacturers use......quote "anything we have lying around" me I wouldn't trust garages and I only use fully synthetic that I supply to the garage, although some oils marked fully synthetic can be as little as 10% fully synthetic the other 90% is just a base oil but again I'm sure Simon will clarify this for you.

    Bryan

  10. #10
    Professional Trader oilman's Avatar
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    Vehicle : Posche

    Trim : 928 S4

    Engine : 5.0

    Year : 1989

    Default

    Try this:

    If you see an expression such as 10W-40, the oil is a multigrade.

    This simply means that the oil falls into 2 viscosity grades, in this case 10W & 40.
    This is made possible by the inclusion of a polymer, a component which slows down the rate of thinning as the oil warms up and slows down the rate of thickening as the oil cools down.
    It was first developed some 50 years ago to avoid the routine of using a thinner oil in winter and a thicker oil in summer.

    Returning to 10w-40, to attain the specification target a 10W ( W = winter) the oil must have a certain maximum viscosity at low temperature. The actual viscosity and the temperature vary with the viscosity grade but in all cases the lower the number, the thinner the oil, e.g. a 5W oil is thinner than a 10W oil at temperatures encountered in UK winter conditions.
    This is important because a thinner oil will circulate faster on cold start, affording better engine protection.

    For the 10w-40 to attain the other specification target a 40 oil must fall within certain limits at 100 deg. C. In this case the temperature target does not vary with the viscosity grade, if there is no "W", the measuring temperature is always 100deg. C. Again the lower the number the thinner the oil, a 30 oil is thinner than a 40 oil at 100 deg. C., which is typical of maximum bulk oil temperatures in an operating engine.

    The engine makers are, of course, very well aware of this and spec. oils according to engine design features, oil pump capacities, manufacturing tolerances, ambient temperature conditions etc. It is important to follow these guidelines, they are important and are an are stipulated for good reasons.

    If the engine has been modified, the operating conditions may well be outside the original design envelope. The stress on the oil caused by increased maximum revs, power output and temperature may indicate that oil of a different type and viscosity grade would be beneficial.

    Cheers
    Simon
    oilmans website : www.opieoils.co.uk/
    e-mail : oilman@opieoils.co.uk
    tel : 01209 215164

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