5W40 fully synth for 8v

[Gandi699]

Will this be suitable? its got some halford 10w40 semi in at the moment but I've just found a 5l Granville fully synthetic that I've never opened in the garage so am I ok to use it in a 1.6 8v xsi motor

[Meto]

That's what I've whacked in mine, some 5w30 castrol fully synthetic stuff. As long as the engine is not high milage, then I don't see a problem with it myself.

edit- sorry misread, not sure with 5w40, but shouldn't be a problem

[SteveWC]

That's what I've whacked in mine, some 5w30 castrol fully synthetic stuff. As long as the engine is not high milage, then I don't see a problem with it myself.

edit- sorry misread, not sure with 5w40, but shouldn't be a problem

Why would the mileage be an issue?

[Tontsy]

potentially with high mileage, the internals of the engine might not be soo smooth! so a thicker oil could be needed to stop it getting wose.

i change my oil depending on the weather, i.e summer and winter

[SteveWC]

potentially with high mileage, the internals of the engine might not be soo smooth! so a thicker oil could be needed to stop it getting wose.

i change my oil depending on the weather, i.e summer and winter

This is true.

But 5w40 gives better lubrication at lower temperatures so unless the car was regularly driven long distances I doubt there would be much difference?

[Gandi699]

Its going to be driven hard on track, if not I'll get some 10w40 but just wanted to use it as it was spare

[Liam_]

5W40 would be my choice for a fast road/ track car. I use Millers XFS 5W40.

[Meto]

Why would the mileage be an issue?

With thin oil, an old engine would burn it easier because the piston rings could be worn, and the thinner oil would seep easier compared to thicker oil.

Very poor description, I don't know lol

[SteveWC]

5W40 would be my choice for a fast road/ track car. I use Millers XFS 5W40.

+1, using motul xcess 5w40 fully synth

With thin oil, an old engine would burn it easier because the piston rings could be worn, and the thinner oil would seep easier compared to thicker oil.

Very poor description, I don't know lol

Right you all realise that the first number is the thickness of the oil when cold, and the second number is the thickness when heated?

So therefore when up to temperature 5w40 and 10w40 are the same thickness?

Also coming back around to my question, why would the mileage be an issue?

[Gandi699]

+1, using motul xcess 5w40 fully synth



Right you all realise that the first number is the thickness of the oil when cold, and the second number is the thickness when heated?

So therefore when up to temperature 5w40 and 10w40 are the same thickness?

I was reading something Millers oil recommended and they said you could drop a grade down if it was fully synth? Either way its going to protect the engine anyway

[SteveWC]

I was reading something Millers oil recommended and they said you could drop a grade down if it was fully synth? Either way its going to protect the engine anyway

There really won't be any difference it, they are virtually the same oil, after 5 minutes of running the engine has already reached several thousand degrees on the inside and the oils are the same thickness.

It's just one of those 'every little helps' for the track I guess.

[Mochachino]

There really won't be any difference it, they are virtually the same oil, after 5 minutes of running the engine has already reached several thousand degrees on the inside and the oils are the same thickness.

It's just one of those 'every little helps' for the track I guess.

How many thousand degrees out of interest?

[Gandi699]

There really won't be any difference it, they are virtually the same oil, after 5 minutes of running the engine has already reached several thousand degrees on the inside and the oils are the same thickness.

It's just one of those 'every little helps' for the track I guess.

several thousand? haha dont you mean hundred

[Mochachino]

10w40 fully synthetic is good int he saxo engines anyway. Some people prefer semi synthetic a fully makes their engine tap. It wont do any harm anyway for the duration of having the oil in. You can experiment abit with different ones.

Halfords oil isnt that good either I wouldnt buy that again if you were intending on doing so, its comma oil. Budget sewage oil.

[SteveWC]

How many thousand degrees out of interest?

There's no exact figure for all engines is there, the temperature of a flame produced by combustion is anywhere from 700-1500°c

Overall engine temperature will of course be less maybe about 200°c

The point is, the difference in temperature is only seen below 60°c which last what, all of 5 minutes?

[SteveWC]

several thousand? haha dont you mean hundred

Right and what about when the petrol explodes about the piston? You think the temperature of that is only a couple of hundred?

[Mochachino]

Less than a quarter of a thousand then lol I was taking the piss btw.

[Mochachino]

Right and what about when the petrol explodes about the piston? You think the temperature of that is only a couple of hundred?

You said the tempreture of the engine reaches several thousand degress after 5 minutes.

Not the flame reaches thousands of degress after 5 minutes. Long flame.

So you keep the combustion chamber lubricated then?

[SteveWC]

You said the tempreture of the engine reaches several thousand degress after 5 minutes.

Not the flame reaches thousands of degress after 5 minutes. Long flame.

So you keep the combustion chamber lubricated then?

Think you're just trying to be smart and missing the point a little bit?

[Mochachino]

Think you're just trying to be smart and missing the point a little bit?

I think you are. I dont think the OP wanted to know about the tempreture of a flame. Just wanted to know if his oil is ok lol

[SteveWC]

I think you are. I dont think the OP wanted to know about the tempreture of a flame. Just wanted to know if his oil is ok lol

To be fair if I'd wasted my life making 22,000+ posts on Saxp, I think I'd be a bit of a smart arse too mate.

/Spam end

[Gandi699]

Right and what about when the petrol explodes about the piston? You think the temperature of that is only a couple of hundred?

No theres no oil on the piston top if things are running correctly surely? it'd just carbonise!

[Mochachino]

Not sure how post count has anything to do with this thread :S theres alot of people with post counts like mine. Wasted my life? Im only on saxp for about 30mins not even that aswell as checking other things on the internet.

[SteveWC]

Not sure how post count has anything to do with this thread :S theres alot of people with post counts like mine. Wasted my life? Im only on saxp for about 30mins not even that aswell as checking other things on the internet.

You're right I'm wrong.

There, we can stop this pointless argument now.

[Mochachino]

Didnt realise it was an arguement lol makes sense why you made the smart comment and the post about post counts now haha

[SteveWC]

Didnt realise it was an arguement lol makes sense why you made the smart comment and the post about post counts now haha

Well it wasn't an argument as such, more can we stop this pointless discussion?

I admitted to being wrong.

[Meto]

+1, using motul xcess 5w40 fully synth



Right you all realise that the first number is the thickness of the oil when cold, and the second number is the thickness when heated?

So therefore when up to temperature 5w40 and 10w40 are the same thickness?

Also coming back around to my question, why would the mileage be an issue?

OK then, The thinner oil would burn more readily in a higher mileage car because of the piston rings being worn, primarily before the car reached operating temp :detective:

[Mochachino]

OK then, The thinner oil would burn more readily in a higher mileage car because of the piston rings being worn, primarily before the car reached operating temp :detective:

Engine* but then the question is the operating tempreture of the engine or the flame that steve likes.