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Thread: help needed, which is the correct engine oil for mk4 1.8 16v sport

  
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    nashy_wales's Avatar
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    help needed, which is the correct engine oil for mk4 1.8 16v sport

    going to attempt the oil change on weekend, but im stuck scratching my head a bit....i cant find in service book or manual or haynes manual which oil to use.

    10w40 is on the stamp in service book, but it doesnt say whether is semi-synthetic, fully synthetic, mineral,etc!

    im a complete novice at car tuning,maintainance, etc...but determind to do/learn as much as i can armed with my bible (haynes manual) & help i get from this forum.

    fully synthetic ive been advised to get, but the guy wasnt 100% sure.

    then to add to the problem...

    do i buy middle priced oil or treat her to a drop of big brand name juice like mobile1, etc or is stuff like tesco's home branded oil just as good!

    i know the obvious answer is to get the best you can, but im not flush with cash and dont want to waste money just coz its got "big" brand label on the front

    she's at least 4k miles overdue a service, so needs some proper TLC at mo.

    many thanks in advance

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    vauxhalls own 10w/40 semi synth is good, or if you want to upgrade then go for a full synth 5w/40. avoid castrol and mobil 1, they are over rated tat and you are merely paying for the name.
    millers,fuchs,comma,silkolene are all good brands

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    Not had any bother with carlube semi in my vaux's, even the old 1.4SR liked it.

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    Carlube is, so far as I can find, the same product that Vauxhall sell except Vauxhall oil on Trade Club is about £11 for 5 litres and Carlube is £20+. Both are made by Delphi and have the same spec according to the sites I trawled a few weeks back.

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    Quote Originally Posted by nry View Post
    Carlube is, so far as I can find, the same product that Vauxhall sell except Vauxhall oil on Trade Club is about £11 for 5 litres and Carlube is £20+. Both are made by Delphi and have the same spec according to the sites I trawled a few weeks back.
    vauxhall 10w40 oil is made by fuch oil,who make oil for silkoline

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    Quote Originally Posted by solorider View Post
    vauxhall 10w40 oil is made by fuch oil,who make oil for silkoline
    Fuchs's blend it? I'll have to have a chat with office staff next time I'm there then, been in twice this week (work), lol.

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    thanks for replys, however, im no wiser...if anything more brain cells fried now...

    i think if this part of my post


    Quote Originally Posted by nashy_wales View Post
    10w40 is on the stamp in service book, but it doesnt say whether is semi-synthetic, fully synthetic, mineral,etc!

    id be in a much less stressed frame of mind.

    even though im flushing the engine and its established that its 100% 10w40...its getting the semi/fully synthetic option correct.

    my mums got a 51 plate corsa...after her oil change down the local monkeys garage. her car sounds like tappets were gone and its broke down at least 8-9 times over lask 3 months.

    i just cant afford to get it wrong and end up killing my engine.

    thanks again for all replies in advance

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    Semi or fully is what you need. I'd not flush the engine unless this has been done since new. A 5w/40 fully synth such as Fuchs Supersyn would be a noticeable step up from 10w/40 semi, though is not essential by any means. 10w/40 from Vauxhall would be the OEM recommended spec.

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    i just remembered that out of the 10 services its had...1st 8 done by vauxhall...would i be right to assume its been 10w40 full synth vauxhall oil used?

    if thats the situation, id assume that last 2 (non vauxhall) services would have followed suit.

    if not then which 1 would you recommend i use to at least try to get as close to the existing oil as poss to avoid wrong mixture of oil in car.

    thanks

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    I'd expect they'd have used their own brand 10w/40 semi synthetic oil.

    You can safely mix oil types, they are all safely mixable with each other. All you want is the right end number, in your case '40', as the first number is simply the thckness when cold - 5w or 10w is perfect in the UK, and having used Vaux 10w/40 semi for 167k, then switching to Fuchs 5w/40 fully synth 2 weeks ago, I can only say that the Fuchs is much quieter from cold and runs lovely and smooth - runs from cold like the Vauxhall oil runs when at temperature.

    For you, it is most likely worth sticking with the Vauxhall oil unless you want to splash out a bit more for a fully synthetic.

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