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[Andy B]

......
 What is the point using an expensive oil that is in my opinion worse than the VX fully synth?

Cos Mobile 1 is a 'name'! Same as people like to pay a furtune for their diesel(sp?) jeans etc etc


I'll go & get my coat!!  :-?

[Kevin Wood]

I read somewhere that someone's contesting Mobil's description of the oil as fully synthetic, claiming it contains mineral stock.

But its price is more indicative of clever marketing and trading on a name than the composition of the oil.

I used to use it religiously but then I got to thinking that I've never had an issue with engine wear with any car anyway (Including my kit car with a 200 BHP tuned Ford Zetec). They normally get tatty, go rusty or I get bored with them before engine condition becomes an issue. I just find a decent value fully synthetic oil (Currently Chevron oil from Costco looks good - 50 quid for 20 litres) and change it regularly.

You can also look at it from the point of view that if you're going to change your oil yourself it costs you nothing to do so you might as well do it more regularly than the 20k Vx now recommend. You then don't need a premium quality oil that lasts for ages.

Anyway.. This is becoming an Oil thread... Must resist...

Kevin

[Markjay]

Well we do agree on one thing - an Omega does not need anything more than Vx Semi-Synth changed every 3k-5k.

Higher-spec oil could make sense if one was to stick to Vx specified 10k or 20k oil changes, but this is not recommended anyway so no point in spending money on oil that would have lasted for another xxxx miles after you drained it!

I disagree with your observations regarding Mobil1 being 'crap oil' - true, the oil spec is way OTT for the Omega and it is overpriced as well (definitely so at £13 per Litre in Petrol Stations, but even at the reduced Costo prices of around £24 per 4L), however being overpriced does not make it 'crap'...

I also disagree with 0W oil causing oil consumtion on the Omega - regadless of your friends' experience with other type of cars. Been using it on mine with no ill effects.

OK, next. What type of petrol do you use.....?  

[Markjay]

I read somewhere that someone's contesting Mobil's description of the oil as fully synthetic, claiming it contains mineral stock.

But its price is more indicative of clever marketing and trading on a name than the composition of the oil....

Sigh.....

See:

http://www.omegaowners.com/forum/YaBB.pl?num=1165427260

 

[Phil]

I did suggest this was locked a few replies ago to avoid this starting a your using the wrong oil thread.  

as i said at the start i use a particular type of oil and nothing anyone here says will make me change it, the question was can different brands be mixed, i received a satisfactory reply so no further replys needed.  

[omegaV6CD]

Well we do agree on one thing - an Omega does not need anything more than Vx Semi-Synth changed every 3k-5k.

Higher-spec oil could make sense if one was to stick to Vx specified 10k or 20k oil changes, but this is not recommended anyway so no point in spending money on oil that would have lasted for another xxxx miles after you drained it!

I disagree with your observations regarding Mobil1 being 'crap oil' - true, the oil spec is way OTT for the Omega and it is overpriced as well (definitely so at £13 per Litre in Petrol Stations, but even at the reduced Costo prices of around £24 per 4L), however being overpriced does not make it 'crap'...

I also disagree with 0W oil causing oil consumtion on the Omega - regadless of your friends' experience with other type of cars. Been using it on mine with no ill effects.

OK, next. What type of petrol do you use.....?  

The mobil one is not famous for its shear stability. From what i remember its a hydrocracked blend with a bit of PAO which means that there is one way of achieving the 0w40, pack it with VI improver additive(Polymer). The polymer molecules expand when the oil is hot to give the viscocity rating required and then they contract with cold weather.
This works fine when the oil is new but as it gets old the polymer molecules break down and then the 0w40 becomes 0w20 within few thousand miles.  If it was a full PAO based or ester based oil then it would be superb but lets face it the Mobil 1 is a marketing achievement rather than a superb oil. I'm not trying to stop you using it though i'm just educating the fellow readers. Also the polymer additives tend to react with Zinc additive which is the primary friction reducing element in the oil, causing sludge so oil people tend to trade off.

[Markjay]

Well we do agree on one thing - an Omega does not need anything more than Vx Semi-Synth changed every 3k-5k.

Higher-spec oil could make sense if one was to stick to Vx specified 10k or 20k oil changes, but this is not recommended anyway so no point in spending money on oil that would have lasted for another xxxx miles after you drained it!

I disagree with your observations regarding Mobil1 being 'crap oil' - true, the oil spec is way OTT for the Omega and it is overpriced as well (definitely so at £13 per Litre in Petrol Stations, but even at the reduced Costo prices of around £24 per 4L), however being overpriced does not make it 'crap'...

I also disagree with 0W oil causing oil consumtion on the Omega - regadless of your friends' experience with other type of cars. Been using it on mine with no ill effects.

OK, next. What type of petrol do you use.....?  

The mobil one is not famous for its shear stability. From what i remember its a hydrocracked blend with a bit of PAO which means that there is one way of achieving the 0w40, pack it with VI improver additive(Polymer). The polymer molecules expand when the oil is hot to give the viscocity rating required and then they contract with cold weather.
This works fine when the oil is new but as it gets old the polymer molecules break down and then the 0w40 becomes 0w20 within few thousand miles.  If it was a full PAO based or ester based oil then it would be superb but lets face it the Mobil 1 is a marketing achievement rather than a superb oil. I'm not trying to stop you using it though i'm just educating the fellow readers. Also the polymer additives tend to react with Zinc additive which is the primary friction reducing element in the oil, causing sludge so oil people tend to trade off.

The paragraph below is from Honest John:
‘The most stable products on the market and those which are being chosen by manufacturers for extended service are fully synthetic PAO (PolyAlphaOlefin). This includes Castrol SLX, Esso Ultron and Mobil 1. These products are extremely stable in extremes of performance….’

I go by what the Honest John website says, though I will not be surprised if you quoted from elsewhere on the Internet saying the opposite... as none of us have a chem lab at home to test the oil, we are bound to believe what we want off the Internet.... as I said I find the info above plausible and supported by other websites.

..anyone here working for Mobile who can settle this issue...?  

but this is from my point of view an academic discussion, I don't think Omegas actually benefit from exepnsive full-synth POA oils.

Also, Mark DTM suggested that Vx own-brand is made by Fuchs. If this is the case then the Vx oil is A+, since Fuchs is used as OE oil for most prestige German marks when the cars leave the factory.

So my practical advice to any newbie out there would be get Vx oil, either semi or full synth, you can't go wrong as long as it is changed at 3-5k intervals.

[Taxi_Driver]

I have this theory....as my 2.2 goes through a litre every 8k......there are 4.5 L in it......therefore every 36k miles it had all its oil changed.....do you think i should change the filter at this point as well  

[CaptainZok]

I have this theory....as my 2.2 goes through a litre every 8k......there are 4.5 L in it......therefore every 36k miles it had all its oil changed.....do you think i should change the filter at this point as well  

Nah just rinse it in the bath and reuse. Oil filters aren't a service item with todays modern engine design.

[Markjay]

I have this theory....as my 2.2 goes through a litre every 8k......there are 4.5 L in it......therefore every 36k miles it had all its oil changed.....do you think i should change the filter at this point as well  

Nah just rinse it in the bath and reuse. Oil filters aren't a service item with todays modern engine design.

Just take it out.... saves you worrying about replacing it.

Also, removing it improves performance - it is called the 'free-flow' design...