Big Phil · Dec 17, 2013

I have been reading all the blurb on changing the oil/filters on the Disco Td5. Some prefer semi synthetic, others go for full synthetic - that I understand.

But I was worried when I read that these oils are "too thin" for the older high mileage Td5's, mine has 109000 on the clock. So if I take this to be true, what is the alternative "thicker" oil. It's a mystery to me.

I did a search on here but did not find owt.

Regards

Phil*

jamesmartin · Dec 17, 2013

Big Phil said:
I have been reading all the blurb on changing the oil/filters on the Disco Td5. Some prefer semi synthetic, others go for full synthetic - that I understand.

But I was worried when I read that these oils are "too thin" for the older high mileage Td5's, mine has 109000 on the clock. So if I take this to be true, what is the alternative "thicker" oil. It's a mystery to me.

I did a search on here but did not find owt.

Regards

Phil*

personally id use 10w/30 or 15w30 trade fleet oil semi synthetic and change regulary

discool · Dec 17, 2013

If your engine is using oil go for a thicker grade to what you are using at present, ie, using 30 try a 40 it's no a cure all but may help, part or semi synthetic oils appear to stay cleaner longer and it's a waste of time money full synthetic unless u had a performance engine.

Search the www, there's loads of oil info there, also the owner handbook will give u grades to suit your part of the world and it's ambient temperatures.

discodrivercumbria · Dec 17, 2013

discool said:
If your engine is using oil go for a thicker grade to what you are using at present, ie, using 30 try a 40 it's no a cure all but may help, part or semi synthetic oils appear to stay cleaner longer and it's a waste of time money full synthetic unless u had a performance engine.

Search the www, there's loads of oil info there, also the owner handbook will give u grades to suit your part of the world and it's ambient temperatures.

he only lives in Sheffield! does he have different ambient temp?

Big Phil · Dec 17, 2013

discodrivercumbria said:
he only lives in Sheffield! does he have different ambient temp?

Aye, we have a Sheffield address, but live out in the sticks, where the temps are a bit lower than it town.

Car is covered in frost tonight for instance.

Thanks for the reply's, semi synthetic it will be.

Regards

Phil*

thebiglad · Dec 18, 2013

Big Phil said:
Aye, we have a Sheffield address, but live out in the sticks, where the temps are a bit lower than it town.

Car is covered in frost tonight for instance.

Thanks for the reply's, semi synthetic it will be.

Regards

Phil*

Hi Phil, here's my advice and why:

Winter months 5w-30 semi or fully synth;

Summer months 5w-40 semi or fully synth;

The first figure indicates the viscosity at low temps; the second figure gives the viscosity at high or running temps

My reasoning is this, for cold engine starts you want the thinner (5w) oil which will penetrate and protect better;
30 takes you up to ambient temps normally encountered during UK winters plus a bit;

40 takes you to all the ambient temps encountered in the UK during summer.

The single most important aspect about protecting your engine is to change the oil frequently irrespective of whether it's semi or fully synth. As fully synth's main advantage is longer drain intervals it seems pointless to someone like me who changes their engine oil and filter every 6,000mls.

Cheers and Happy Christmas

Dave

iansoady · Dec 18, 2013

thebiglad said:
As fully synth's main advantage is longer drain intervals it seems pointless to someone like me who changes their engine oil and filter every 6,000mls.

Cheers and Happy Christmas

Dave

I'm not actually sure about this (though of course it does have longer life). Its main advantage as far as I understand is that it keeps its viscosity over big temperature ranges better than semi- or dino- do. It also flows better at low temperatures thus getting where it's needed faster.

Why Choose a Synthetic Engine Oil?

for instance.

I use fully synthetic 5w/30 all year in mine (130,000 miles). It doesn't use a drop between changes. It's only a few quid more than semi and worth that AFAIC.

DIFFLOCK66 · Dec 18, 2013

I've used fully synth because that's what it says in the book - not heard about the thicker viscosity "trick" for higher mileage "new" (TD5 is a new engine in my book) engines until now. Even so I've done a full fuel filter, oil filter & oil change at 6000 miles.

Big Phil · Dec 18, 2013

thebiglad said:
Hi Phil, here's my advice and why:

Winter months 5w-30 semi or fully synth;

Summer months 5w-40 semi or fully synth;

The first figure indicates the viscosity at low temps; the second figure gives the viscosity at high or running temps

My reasoning is this, for cold engine starts you want the thinner (5w) oil which will penetrate and protect better;
30 takes you up to ambient temps normally encountered during UK winters plus a bit;

40 takes you to all the ambient temps encountered in the UK during summer.

The single most important aspect about protecting your engine is to change the oil frequently irrespective of whether it's semi or fully synth. As fully synth's main advantage is longer drain intervals it seems pointless to someone like me who changes their engine oil and filter every 6,000mls.

Cheers and Happy Christmas

Dave

Aye Dave. Thanks for the answer - makes good sense to me. Been to Halfrauds and got the Castrol Magnatec F/S.

May I wish you and yours a Very Happy Xmas and a Prosperous New Year.

To the other guys who have responded, May I also wish you the Seasons Greetings, and thanks for your reply's.

Phil*

Big Phil

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jamesmartin

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discodrivercumbria

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Big Phil

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