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10W40 vs 5W40 vs 0W40


Guniang
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Wads the diff between 10W40 vs 5W40 vs 0W40??

 

From wad i understand theres no diff if being used in Spore rite??

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Neutral Newbie

Yea!!! Finally a post on these different numbers for engine oil... Please enlighten me as well guys... I've a 50K servicing coming up... [nod]

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If all things being equal than a 0w40 oil will give you best FC but may shear due to higher amount of VII (viscosity index improver) while 10w40 will give the worst FC but more shear stable.

It all depends on what's your need. If normal driving than 0w40 will be good enough but if you are those super HRF club member than 10w40 the choice. Oh one more thing, HTHS is the number you may want to compare if protection is your top priority.

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Please do a search. Under Resources, there would be a few info there. There's one titled Motor Oil FAQ. Read it for more info.

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(edited)
Wads the diff between 10W40 vs 5W40 vs 0W40??

 

From wad i understand theres no diff if being used in Spore rite??

 

1. There is enough information that you can find in the resource folders or even in the web.

 

2. For moderate Fuel efficiency and wear prevention, I will pick 5W30. 0W30/0W40? no point paying for the premium. 10W40 or even 15W40, probably for older cars.

 

Regards,

Edited by Kelpie
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If not wrong 10W 0W and 5W doesnt matters... Its just temperature rating...

 

40 30 20 50 after the W matters...Its the thickness of the oil... The thinner it is the better FC but less protection

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engine oil is not about FC. It is about lubrication, wear protection and corrosion prevention and engine smooth running. FC is just the secondary consideration.

thinner oil in theory give less resistance and thus suppose to improve "FC" but IMO thinner oil help the oil to flow faster during cold start esp in cold climatic condition.

When the engine is warm up and the oil pump is working fine, oil is flowing to all the moving mechanical parts. no issue, good syn oil will do. It does'nt mean a thin blended oil will breakdown earlier than a thicker oil during the high stress of boundary layer lubrication, it is the quality of the oil.

My understanding of boundary layer lub is that when two metal squeeze out the oil until a very very thin film that still stick on the metals that are rubbing each other, no think oil or thin oil present just that little bonding of oil on the metal that we don't see but can feel when touch.

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He is driving a VAG. Best is to stick with the VW ratings. Surely you must have heard about the 1.8T horror stories from BITOG. Anyway, if he likes the best, better go and get the Elves to help. sly.gif Only the Elves have the proven 0W30 Elixir of Eternal Engine Youth for 16k km duration. laugh.gif

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(edited)

Oh VAG, then better change the oil more often...hehehe... or auto-rx it once in a while..

 

Elves aka Castrol SLX 0w30

Edited by Trex101
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Castrol SLX-A3 oil is dyed green. The oil gurus call it the Elixir of the Elves. Proven track record. Thick until almost 40wt. Only a hair short. Carries the required ratings for your car. Not cheap by cxxxxxe standards. $78 for 4L at Forklift Enterprises.

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