Car oil question!

cardiff_gareth

cardiff_gareth

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Gareth
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Asking here as I see there's a few car buffs here who'll know the answer!

Fully synthetic 5w 30 oil

4 different prices for the same thing?

Try say they're for different car manufacturers but I have a Mazda and isn't listed on the bottle.

When did buying car oil get so difficult!
 

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Any of them will do, being Scots I would plump for the cheapest!
 
I have never bought any oil for my Camry between annual services. So I have no idea what the shop price might be these days.
It never seems to use any at all. It still shows very near full at the end of the year.
 
£22 for mine for 2L's... Its a Peugeot 208 for christs sake.

Apparently on MOT it had no oil in at all so forced my hand to buy it :(
 
Yeah mine was on empty when the RAC man checked it which was gutting as it was serviced 11 months ago. Drove some 400 miles since and it hasn't moved so guess I was short changed on the oil at service?

I'll buy the cheapest one then!
 
troutfisher said:
Weekly checks -Oil, Water, Tyres, Windscreen Washer, used to be battery as well but they are mostly sealed now
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at least every fortnight for me although the screen wash tends to get topped up more than often with this weather.
 
They might have the same viscosity - but it's worth checking out their API ratings (will be printed in tiny small print somewhere on the bottles)

The API (American Petroleum Institute) basically tells you how good the oil is for a certain age of car.

If your vehicle is newer than 2010 - you should be using an oil with an API rating of SN (Petrol engines) - Diesels are different.

You can see the details here: API

So look at each of the 4 bottles for their API rating - if they're all API SN - they're all pretty much the same. (It's likely they will be)
 
Diesels with DPF need low Low SAPS (Sulphated Ash, Phosphorous, Sulphur) oil, see what your owners handbook says.
 
Check your handbook for the exact specification required. Just because they are all the same viscosity, it doesn't mean they are the correct specification. Get it wrong and you could start the onset of wear on bearing faces.
 
nilagin said:
Check your handbook for the exact specification required. Just because they are all the same viscosity, it doesn't mean they are the correct specification. Get it wrong and you could start the onset of wear on bearing faces.
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Yep, moderns all have specific specifications you're supposed to use. Not like the good old days when you could just buy Castrol GTX and bung it in just about any petrol engined car and it would be good for the 6000 miles to the next service.
 
The Castrol site recommends their Edge 5W-30 LL for your Mazda; specs for that mention ACEA C3 rating and VW specifications.
From your pic, that would likely be the purple one, but check the blurb on the back to see which one's C3.
 
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