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Mobil 1 5w-50 Or 10w-30

Beef

By Beef,
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wilch Grand Master

wilch

Posted
Posted

Ummm... I think he said 5w50.

Which is what I use, over filled (to the bottom of the bump on the stick) ofcourse.

I think 10w30 would break down too early in an RB turbo engine (engine gets too hot for that oil).

Busky2k Veteran

Busky2k

Posted
Posted

Sorry yes 5W50. Same thing really. Still nice and thick.

The M1 10W30 won't break down in an RB. Its fully synthetic PAO based oil so it can handle the stress without breaking a sweat. Hell Nissan's OEM oil is 7.5W30 mineral stuff so if that can do the job...

Your average RB doesnt run any hotter than any other engine, why would you say that? The turbo is water cooled anyway so the turbo isn't as hard on the oil as the days of old.

Guest 40th-edition

Guest 40th-edition

Posted
Posted

i run 10w30 because i get it from work.. does the job and have no probs with it at all..

the numbers given to the weights of the oils r over rated ne ways... 50 is a large cold weight and 0 is just bull shit.. just oil componeys claming crap ( i know they go through sia testing)

djr81 Grand Master

djr81

Posted
Posted
i run 10w30 because i get it from work.. does the job and have no probs with it at all..

the numbers given to the weights of the oils r over rated ne ways... 50 is a large cold weight and 0 is just bull shit.. just oil componeys claming crap ( i know they go through sia testing)

50 is not the cold weight. It is the measure of the high temperature viscosity.

As for the numbers being crap, it is easy to compare the difference between two grades. Just tip some out of the bottle - it will suprise you how different they are.

Essentially, to compare the 5W50 to the 10W30 they are basically the same oil, just with different viscosity modfiers. The 5W50 will be "thinner' when cold & "thicker" when hot. This is a relative thing as obviously the oil's viscosity will decrease as it gets hotter.

At the end of the day you will be marginally better off with the 5W50 because it is more stable, most noticeably when hot.

Beef Community Regular

Beef

Posted
  • Author
Posted
is it 5W50, or 5W30? cause 5W50 sounds like a pretty thick oil to me.

its definitley 5w-50.... but u can buy 10w-30 aswell....

when is oil at its thickest? i never drive my car for longer than 50 mins at a time, i dont go on long trips.... so what would be better for me?

im only ever doing little trips to work and stuff... never big road trips..

Beef

mad082 Grand Master

mad082

Posted
Posted (edited)

whether you drive for 20 mins or 5 hours, once the car car has come up to operating temp the oil temp shouldn't rise (unless you are flogging it). normal oil gets thinner as it got hot, but multigrade oils are designed so they don't thin as much.

Edited by mad082
mad082 Grand Master

mad082

Posted
Posted

just doing a bit of research, normally oil thins at higher temp. multi-grade oils have polymers that stop it hinning too much (so its thin when cold, and not too thin when hot). the dissadvantage with high range oils (big gap between 1st and 2nd numbers) is that they are more prone to breaking down. it is the oil that lubricates, not the additives, so the less additives, the better.

Lost Collaborator

Lost

Posted
Posted

Hi Guys,

There was mention above of filling oil past the MAX to the BUMP. I was told by one mechanic that this reduces the change of oil surge and is ok but by another mechnic that filling past MAX on the dipstick can cause potential damage. Can I get some sort of common consensus on whether this is ok?

Cheers.

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