Can we use 10W-40 in all our cars?

[Swoxy]

I have a diesel Fabia, my brother has a petrol Micra and my Mum has a petrol 406. The Castrol website recommends 5W-30 or 10W-40 for the Fabia, 0W-30 or 10W-40 for the Micra and 0W-30 or 10W-40 for the 406. I bought 20l of semi synthetic Chevron Supreme Diesel 10W-40 from Costco for £35. Can we use it in all our cars?

[Swoxy]

MElliottUK said:

diesel fabia maybe a PD engine?

if so you need 505.01 spec oil, just so your aware

It's a Fabia SDI so it's not a PD engine.

TotalControl said:

No. Just don't do it. Google as to why.

Just found this ...

http://www.carbibles.com/engineoil_bible.html said:

Can I use diesel engine oil in my petrol engine?

Not really. Diesel engines run much higher compression ratios than petrol engines and they run a lot hotter, so the oil is formulated to deal with this. Plus they produce a lot more dirt in terms of combustion by-products. Diesel-rated oils typically have more detergents in them to deal with this. It's not unheard of for diesel oils to clean a petrol engine so well that it loses compression. Diesel-rated oils also have an anti-foaming agent in them which is unique to diesel engines, and not needed in petrol engines.

Edited by Swoxy on Saturday 27th December 20:09

[Swoxy]

blank said:

If the oil meets or exceeds the specs the cars need, then yes you can use them. I'd be most concerned about the Fabia needing a certain spec.

It's 5W-40 to 20W-50 according to my Haynes manual. It's on the standard service interval based on distance and time so doesn't require Skoda 503 00.

So I guess the Chevron Supreme Diesel 10W-40 is fine for the Fabia but not for our other cars?

Edited by Swoxy on Saturday 27th December 20:18