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Oil 5w 30 And 5w 40 Compatibility

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Need to top up my oil but getting confused some sites say 5w 40 others say 5w 30 is there any difference in them its for a fiat 500 1.2 petrol 2014 any advice appreciated 

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They're pretty close and for just a topup it probably doesn't matter, 5w30 is a more common choice.

 

The handbook that came with your car should tell you what oil you need.

Edited by geared

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I thought handbook would but read every page no mention tried Google but I get those 2 options just scared of doing damage if its wrong oil

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That's more for twin air engine mines not that one

If I check euro car parts they are 5w 40 if I check halfords they are 5w 30 ebay is both but mostly 5w 40 I have a new bottle of 5w 30 but don't know what to do

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If it was me and it needed topping up I would use what I had.  Years ago Castrol 20W/50 multigrade was put in most engines.  If you take your car to a garage for an annual service, you'll probably never know what oil they have put in, but you won't worry about it.

 

 

Edited by Janus

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I think your right I will just top up with 5w 30 

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Will make no difference, especially at this time of year.

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Be wary of trusting the handbook.

 

Over time, long term testing and feedback from owners & dealer servicing departments the information can change from when it was published.

Edited by alchresearch

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What you have to remember is any oil is better than no oil. The ones we service at work get 5/40 as this is recommended by the fiat dealer in our network. As a top up 5/30 won't hurt, but I would always recommend using the right stuff where possible.

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