What weight oil?

NOSNotch

Founding Member

Oct 20, 2001

577

0

0

South Jersey

May 8, 2006

#1

• May 8, 2006

• #1

I've got a pretty fresh 306 in my coupe and never really thought about it before but what weight oil is everyone runnin thru the year? i started with 20w50 and right now its got 10w40 in it cuz its all we had around the shop but im thinkin about goin back to the 20w50 for the warmer months. so jw what everyones runnin in their cars. thanks

 

sgarlic

Founding Member

Apr 21, 2001

3,085

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56

May 8, 2006

#2

• May 8, 2006

• #2

You should run whatever the thinnest oil you can maintain good hot idle pressure with. I would probably go with 10w30 and see if you have good pressure.. if not 10w40. Living in Jersey, I wouldn't think you'd need 20w50.. just my .02.

 

88stangmangt

Active Member

Nov 25, 2003

2,332

1

48

Stafford,VA

May 8, 2006

#3

• May 8, 2006

• #3

good lord i use 15w40 in all diesel motors....i run 5w30 in all my cars.....both mustangs the pos chevy and my Jetta.

 

poneypower89

Now everyone in the world will know I wanna bang t

Dec 6, 2004

0

3

28

Indianapolis, Indiana

May 8, 2006

#4

• May 8, 2006

• #4

sgarlic said:

You should run whatever the thinnest oil you can maintain good hot idle pressure with. I would probably go with 10w30 and see if you have good pressure.. if not 10w40. Living in Jersey, I wouldn't think you'd need 20w50.. just my .02.

Click to expand...

I pretty much just run 10W40 all year round. 20W50 definetely sounds like overkill in your case.

 

fidstang

New Member

Jul 19, 2005

307

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South Lansing

May 8, 2006

#5

• May 8, 2006

• #5

10w30 then when it gets hot I use Royal Purple Synthetic. If your store it during winter, might as well do a tune up while you have it up.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

May 8, 2006

#6

• May 8, 2006

• #6

Andy summed it up nicely. WIth a new mill, unless you had it built loose, 10W-30 should do you fine. If pressure is lacking, then step up.

Good luck.

 

the98stang

Active Member

Aug 12, 2005

2,408

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47

Clovis, CA

May 8, 2006

#7

• May 8, 2006

• #7

Holy sh1t...20w-50 in a brand new engine is WAY too thick. You need 5w30 synthetic in there, nothing thicker than 10w-30.

 

DMAN302

My mom says thanks for the pearl necklace.

Nov 8, 2003

2,120

2

59

windsor, Canada

May 8, 2006

#8

• May 8, 2006

• #8

remember in the mornings or after extended sitting that 20 weight oil is going to be like syrup compared to 10 or 5 weight...start up IMO is were significant wear occurs when the oil can't get there fast enough. I like a 10-30 dyno for myself...mostly castrol, but the engine is new(er) and IMO not ready for synthetic. As stated SO many times, as important as weight and type is the use of the BEST quality filter available and keeping the oil CLEAN.

 

fidstang

New Member

Jul 19, 2005

307

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South Lansing

May 8, 2006

#9

• May 8, 2006

• #9

I thought the first set of numbers were the temp. range and the second, the weight or thickness of oil.

 

DMAN302

My mom says thanks for the pearl necklace.

Nov 8, 2003

2,120

2

59

windsor, Canada

May 8, 2006

#10

• May 8, 2006

• #10

first number indicates the cold characteristics of the oil..the second is the warm...basic idea by no means the 'scientific' explanation that someone will likely offer.

 

G

GTS95

New Member

Apr 26, 2006

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Macon Ga

May 30, 2006

#11

• May 30, 2006

• #11

Run 0w40 mobil 1 in my 1996
cobra...
L.

 

E

El_CUCUY

Member

May 1, 2006

95

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6

RGV

May 30, 2006

#12

• May 30, 2006

• #12

i run 15w 50 on mine and she's doing great here with the weather we get... was running 10w 30 but had a small leak...I fixed it and every since then i've run this on my engine. Car has less than 15,000 miles and about seven oiol changes.... car would sit for long period of time but now she is my daily driver... Best advice keep an eye on your pressure but start with 10w 30 and then work your way up.

 

maverick0716

Founding Member

Jan 12, 2002

3,924

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Chilliwack, BC, Canada

May 31, 2006

#13

• May 31, 2006

• #13

10W-30 Mobil 1 here.

 

T

Treachery

Founding Member

Jun 9, 2002

148

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May 31, 2006

#14

• May 31, 2006

• #14

20/50 Redline for me. All year round. No problems.

Question: Will the weight of the oil affect how much oil pressure is being produced?

 

maverick0716

Founding Member

Jan 12, 2002

3,924

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Chilliwack, BC, Canada

May 31, 2006

#15

• May 31, 2006

• #15

Treachery said:

20/50 Redline for me. All year round. No problems.

Question: Will the weight of the oil affect how much oil pressure is being produced?

Click to expand...

Yes

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

Jun 1, 2006

#16

• Jun 1, 2006

• #16

To go a little further, pressure is resistance to flow. So if you have a more viscous medium (a thicker oil), it will be more resistive to flow (Canola oil flows easier than molasses, like 5W-20 flows easier than 20W-50). And this extra resistance shows up as increased pressure.