10W40 Vs 5W30

[piglet]

Bought 20l 5W30 for the Connect, my 20l of 10W40 seems to have evaporated (all over sons motocrosser chain I expect)
Is 5W30 a bit pissy for the Hdi? needs to go in a 1.5D 106 as well.
Thoughts gents?

[jasper5]

5w40 would be best for the HDi, but 5w30 is fine....exactly the same situation with the 106.

[piglet]

Thanks Jasper, that's probably what I'll do.
I checked the Haynes manuals for both, the 106 book gives 10W40 but I cannot find a vis spec anywhere in the 406 Haynes, it just gives the oil spec- ACEA B3

[dirtydirtydiesel]

Hi piglet,
As I said before to this post, but here's what it says in the handbook

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[piglet]

That's a proper manual, thanks.
wot you said, any of the above.
Can I assume lighter oil for colder climes?

[dirtydirtydiesel]

I really don't know what to say piglet ,
I don't know if you can see it, in my hand book next to 5w/30 is an asterisk at the bottom of the page.
It states,
Fuel economy oil can only be used in engines designed for it's use (from 2000 on model year)

I really can't see what difference it will make, but I put 5w40 fully synthetic in mine
It's the best recommended oil & I will continue to do so, as I get 5 litres for less than £20.00
Good old ebay

I see by your sig that yours is a 90, how many miles has it covered & how many more do you plan on doing in it ?
I don't wish to be arrogant but unless yours is remapped / towing / you really care ( in a ocd way) the 5w30 should be fine

If your really not sure, can you return the oil for a refund / sell it on & get some 10w40
I know it might be old timers wisdom but my old man use to say on older, higher milage car's,
Stick with what it's been running

Hope this helps DDD

[rwb]

Strictly 5W-30 C3 in the DW12B
seems that it's getting thinner...


As I understand it, thinner oil means better fuel efficiency at the cost of the possibility of engine life...

[piglet]

I think you're right Diesel, if you're pottering around like an old fart it aint gonna matter within reason.
I do have a St.1 on mine but I don't drive hard.
I bought the right oil for the Connect as that's our most expensive vehicle now.
I would be more concerned about the boy ragging the nuts off our old 106D. We've all been there.