Hi all,

 

I've recently purchased a 2009 Fabia 2 TDi 105 PD with 48k miles. QG0 code on the sticker in the service book. no DPF (I think)

 

I checked the handbook for oil spec and it says 505 01 but no mention of 5/30 or 5/40.

 

Having looked at a few threads - some people say 5/30 is bad for the camshaft. I rang the parts dept at Skoda Marshall Nottingham and they said it should have 0/30. I have found out that the car had 5/30 XPR on the last service.

 

Should I go for 5/40 on the next service or do what Marshall Skoda say and have 0/30 ?

 

Thanks, Dave

As long as it explicitly meets the 505 01 spec, viscosity is completely up to you.

2 hours ago, Dave_Notts said:

Hi all,

 

I've recently purchased a 2009 Fabia 2 TDi 105 PD with 48k miles. QG0 code on the sticker in the service book. no DPF (I think)

 

I checked the handbook for oil spec and it says 505 01 but no mention of 5/30 or 5/40.

 

Having looked at a few threads - some people say 5/30 is bad for the camshaft. I rang the parts dept at Skoda Marshall Nottingham and they said it should have 0/30. I have found out that the car had 5/30 XPR on the last service.

 

Should I go for 5/40 on the next service or do what Marshall Skoda say and have 0/30 ?

 

Thanks, Dave

 

To echo @Breezy_Pete, please ignore viscosity completely, it's effectively meaningless. As long as the oil meets the spec. 505.01 or 507 then it's fine.

Thanks for the replies

 

Dave

On 04/09/2023 at 19:18, Breezy_Pete said:

As long as it explicitly meets the 505 01 spec, viscosity is completely up to you.

 

What effect will the viscosity have, though? From what I know, "thicker" oil may affect fuel economy a little and it may also take longer for it to reach parts of the engine furthest from the oil pump as it won't flow so quickly and if you're in a really cold environment, bit might be better to use a "thinner" oil.

 

Is this all academic if the oil meets the standard because the standard will ensure that the vulnerable parts are always protected? 

Edited 10 September, 20232 yr by briscaF1

1 minute ago, briscaF1 said:

Is this all academic if the oil meets the standard because the standard will ensure that the vulnerable parts are always protected?

Exactly this. You would probably find if you looked into it that the difference in viscosity of one that is in e.g. 5W30 group versus one in the 5W40 group are very small. Just either side of the arbitrary boundary.

The SAE viscosity index is prehistoric, from way back before synthetics, synthetics have made it all about the additive pack, viscosity is largely redundant, modern oils flow like water when hot but are as slippery as ice.

Edited 10 September, 20232 yr by sepulchrave