Do I need 50w oil?

[Ptrug]

G2, 120mm on 93.

I don’t track her and rarely WOT but I def drive her hard.

Should I still put 50w as a precaution? Thinking mobile 1 super car which is 40w. Currently on mobile one 30w.

Thoughts?

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[GregO]

Thinking mobile 1 super car which is 40w.

 

[LOL WUT]

Need? No.

I run 5w40 and all is fine.

 

[Gregory347]

I run Valvoline European 5W-40. Good oil and fair price at Walmart. I ran Motorcraft synthetic 5W-50 for couple oil changes but read it shears to 5W-40 rather quickly and it more expensive.

 

[CrackedHorn]

30 or 40 weight is fine for a centri blowers and street use.

Lots of good options as far as brand of oil. More import is the oil change interval.

 

[EFI]

You only need thicker oil when you plan on taking it past normal operating temperature.

You need to maintain a certain viscosity based on internal clearances. At high temperatures, viscosity is reduced so that's why people go with a 40 or 50 weight oil so that as it thins out it gets back to the original requirement for viscosity. If you don't take the oil past 230*, then you don't need anymore than 30 weight. Also quality is more important than weight, I'd rather run a high quality full synthetic 30 than a crap quality 50.

 

[Ptrug]

You only need thicker oil when you plan on taking it past normal operating temperature.

You need to maintain a certain viscosity based on internal clearances. At high temperatures, viscosity is reduced so that's why people go with a 40 or 50 weight oil so that as it thins out it gets back to the original requirement for viscosity. If you don't take the oil past 230*, then you don't need anymore than 30 weight. Also quality is more important than weight, I'd rather run a high quality full synthetic 30 than a crap quality 50.

This is the answer. Thank you!

But let me ask you, if I can get mobile, one supercar, which is 40w, probably still a better choice, correct? Or is it irrelevant in my situation?

 

[EFI]

But let me ask you, if I can get mobile, one supercar, which is 40w, probably still a better choice, correct? Or is it irrelevant in my situation?

It's basically irrelevant. For your needs it's going to perform just as well as a quality PUP 5w30.

 

[Ptrug]

It's basically irrelevant. For your needs it's going to perform just as well as a quality PUP 5w30.

PUP over Mobile One?

 

[K4fxd]

40w, probably still a better choice, correct? Or is it irrelevant in my situation?

I would err on the side of thicker. If not needed for temps it is better for the cam phasers. The thicker oil holds cam timing better, which is why I run 40 weight in a N/A engine.

 

[K4fxd]

PUP over Mobile One?

Any brand with the A3/B4 spec is what I recommend. That is a performance spec not an emissions one.

 

[WildHorse]

which is why I run 40 weight in a N/A engine.

Me too. 5W40.
12-13 BOSS Mustangs used 5w50.. and 95% of the owners never track them

 

[CrackedHorn]

PUP over Mobile One?

I would.

 

[EFI]

PUP over Mobile One?

Yup, all day every day.

That's not to say the Euro spec M1 is trash, just would not be my first choice.

 

[Ptrug]

Yup, all day every day.

That's not to say the Euro spec M1 is trash, just would not be my first choice.

My local shop carries 0w-40 in the PUP and 5w-30. I know your comments about not needing anything above 30w but I am curious if the 0w to 5w make any difference if I err on the side of using 40w?

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