Oil 5-20 vs. 5-30

[Twenty15]

Question: The oil cap says 5-20 and the manual says 5-30. Who is right?

Thanks

EDIT: My bad. I was reading the other engines in the manual. It is 5-20 on both the cap an the manual

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[Anthony@HTM]

5w-20 is correct however I'd go with 5w-30

Upside is better protection, downside is slightly less mpg and longer warm up times.

 

[badass03ragtop]

Manual says 5-20 for GT, 5-30 for EB, and 5-20 for V6

 

[Budwise]

30 unless you grandma the car around.

 

[valentinoamoro]

I'd even consider 5W -40 (like Liquimoly) - but I wanted a few more opinions. The NA engine can run hot once you rev it a lot (like on track) - the 7000 rpm redline is no joke.
5W-20 is too low for extended sessions, look at the cylinder head temps at WOT to see what I'm talking about.

The BMW I owned required 10W-60, and it revved till 8200 rpm.

 

[Old 5 Oh]

I'd go with the 5W-20 for the V6 and V8, unless you want a voided warranty.

Most of us old folks probably think 20W-50 would be even better, since that was the hot setup when we were in high school. Oil has changes a LOT. Viscosity is not the same as film toughness, which is what you are really concerned about. So long as the oil will stick to bearing surfaces and prevent metal-to-metal contact, thinner is better. It used to be that only thicker oils would stand up. Not true any longer. Petroleum engineering, making life better for fun and profit.

 

[5.0GT]

I use 5w 30.

 

[JimmyTwoTimes]

And use real natural oil, not fake synthetic oil. Much like fake "cheese product" instead of real cheese, the synthetic will never be as good as the real thing.

 

[Paulie]

And use real natural oil, not fake synthetic oil. Much like fake "cheese product" instead of real cheese, the synthetic will never be as good as the real thing.

Oil changes are for suckers, just add to keep the level up.
I sold my last ride with the og filter.
Cheese poofs...ftw

 

[OppoLock]

And use real natural oil, not fake synthetic oil. Much like fake "cheese product" instead of real cheese, the synthetic will never be as good as the real thing.

Not sure if joke...

 

[09jsw]

And use real natural oil, not fake synthetic oil. Much like fake "cheese product" instead of real cheese, the synthetic will never be as good as the real thing.

Is this guy serious?

 

[Budwise]

I highly recommend the oil delete mod.

 

[kn7671]

And use real natural oil, not fake synthetic oil. Much like fake "cheese product" instead of real cheese, the synthetic will never be as good as the real thing.

Oh brother. :gossip:

 

[evo8904]

I highly recommend the oil delete mod.

I swapped my oil out for olive oil. It's a greener option.

 

[valentinoamoro]

Inspired by Jimmy, I have only decided to use this product.
100% organic grass fed butter from Ireland. Nothing else will do for my Mustang.

http://kerrygoldusa.com/faq/

I am also only using the natural Mustang, no fake artificial stuff anymore. This is my new ride, in ebony.

http://en.wikipedia.org/wiki/Mustang#mediaviewer/File:Mustanggelding.jpg

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