Mobile 1 10-30 weight oil catches SUCH A BAD RAP! on this site. Why? You guys dont bat an eye at 10-30 Syntec (which is almost a full point thinner CST@100*C) You guys dont diss 10-30 dino oils like GTX, which are thinner than the M1 at 100*C. So come on, Patman specifically, WHY!? do people hate Mobile 1 10-30 and is there a problem running it in my car. My car makes less rocker noise with the M1 10-30 (10.7 CST) than the 10-40 Syntec (13.2 CST) stuff. I run 6qts as per recommendation by Patman with the stock size filter.

CST of synthetic 10-30 oils @ 100*C
Mobile 1:10.7
Royal purple: 10.7
Castrol Syntec: 10.1
Redline:10.7
Amsoil:10.5
Valvoline:11.0
Quaker State:10.5

These are all verifieble on the manufacturers websites where I got this info from. Now please, Someone tell me why Mobile 1, 10-30 full synthetic is such **** compared to other oils. It is nowhere near "thin" for a 30 weight oil, in fact, only ONE OIL is heavier. I like the way my car performs with 10-30 M1, but I want to know if I am hurting things or causing excess wear by missing something?

 

Personally I don't have any problem with M1 10W30, however, I'm much happier with the M1 0W40. It's cut my valvetrain noise in half and provides a 3-5psi increase in oil pressure.

 

What oil pressure do you have? a 13.2 CST oil doubled my valvetrain noise, as it has others, seems to be a 50/50 thing in problem/improvement. I just want to know is 10-30 is "bad" for my motor or will cause more wear. I like the quiet but dont want to be hurt by it.

(Idle I have a tad over 40, cruising at 70 in 6th I have around 50, and anything over 2500 it heads to the 60+ area normally/All pressures given at full temp)

 

Took the words right out of my mouth.

When i was trying to choose the right oil for my car M1 10w30 was getting a bad wrap *** well

 

My oil pressure is at about 37-38psi at fully warm idle in park/neutral with M1 0W40. Used to be at about 34-35psi with M1 10W30. Of course it gets lower when it gets really hot out.

Not sure why the thicker oil would increase your valvetrain noise. Never heard of that before. I have the usual LS1 sewing machine sound from my stock valvetrain, and it was quite a bit louder with the thinner oil.

 

You have lower pressure than me with a thicker oil...hrmmm, 01 mains were supposed to be a bit tighter...proof? Anywho

Yeah, mine got louder, as have several others who have tried heavier oil if you search the forums.

 

I have lower oil pressure because my car idles at 650rpm in P/N vs your 800rpm (A4 vs M6). When I shift into gear the idle drops to 550rpm and the oil pressure goes down to about 35.

When I put the cam in my WS6 (A4) and raised the idle to 800, the oil pressure went up about 3-5psi.

 

Oh, true. Well, when I bog big time It has never gone under 40, and I mean doing a takeoff heavy on the clutch light on the gas, 400rpm has been seen, lol. Maybe there wasnt enough time for the guage to register the pressure drop though, it dropped to 40 from what I saw. Anywho, back to the original, anyone have EMPIRICAL evidence thatn 10-30 M1 is not good for these things when changed every 3-4K miles?

 

I just checked www.mobil1.com and found the following:

Typical Properties

Mobil 1 5W-30

SAE Grade 5W-30
Viscosity, ASTM D 445
cSt @ 40º C 64.8
cSt @ 100º C 11.3
Viscosity Index, ASTM D 2270 169
Sulfated Ash, wt%, ASTM D 874 1.0
HTHS Viscosity, mPa·s @ 150ºC ASTM D 4683 3.09
Pour Point, ºC, ASTM D 97 -54
Flash Point, ºC, ASTM D 92 230
Density @15º C kg/l, ASTM D 4052 0.80


Typical Properties

Mobil 1 10W-30

SAE Grade 10W-30
Viscosity, ASTM D 445
cSt @ 40º C 62
cSt @ 100º C 10.0
Viscosity Index, ASTM D 2270 147
Sulfated Ash, wt%, ASTM D 874 1.0
HTHS Viscosity, mPa·s @ 150ºC ASTM D 4683 3.14
Pour Point, ºC, ASTM D 97 -45
Flash Point, ºC, ASTM D 92 224
Density @15º C kg/l, ASTM D 4052 0.86


Typical Properties

Mobil 1 0W-40

SAE Grade 0W-40
Viscosity, ASTM D 445
cSt @ 40º C 80
cSt @ 100º C 14.3
Viscosity Index, ASTM D 2270 187
Sulfated Ash, wt%, ASTM D 874 1.2
HTHS Viscosity, mPa·s @ 150ºC ASTM D 4683 3.6
Pour Point, ºC, ASTM D 97 -54
Flash Point, ºC, ASTM D 92 236
Density @15º C kg/l, ASTM D 4052 0.855

___________________________________________

Oddly enough the cst@100c is higher on the M1 5W30 than the 10W30. Interesting. But the 0W40 is what I use.

 

I don't think there is a lot of hate for Mobil 1 oil. There are a few people here who "hate" Mobil 1 oil and these are the same people that like things just because the majority do. Their hatred is based on nothing factual for the most part.

I've said this before and I'll say it again, just about every oil on the market will do fine in an LS1 engine if regular maintenance is followed. The fact is the LS1 prefers a cst closer to 12-13 at temperature and Mobil 1 5W-30/0W-30 are a good bit lower.

I use GC (0W-30 German is MUCH different than the stuff you quote) because I have had my oil tested and when tests with GC come back there was virtually no engine wear and they continue to tell me I can go further on my oil. My car also stopped losing oil and got seemed to have gotten less noisy. The noisy part may just have been me but the fact that I now go 3000+ miles and use less than 1/4 qt while when I used M1 5W-30 I burned more than 1 full qt between changes tells me I'll stick with the GC. Do I think M1 is a bad oil?? Nope, used it in every other car I've owned until my LS1.

 

I use Mobil1 5w30 and have no issues with valvetrain noise and oil consumption for the Z28. I also use it in my daily driver - 03 GMC Sierra Z71 and again - no issues on oil consumption and valvetrain noise.

 

http://www.mobil.com/USA-English/Lub...erformance.asp
I use EP, not the regular mobile 1 and all my oil weights were the companies top-line oils, since im using a top-line oil it was only fair to compare such, *note* this guys numbers are indeed dead on with regular Mobile 1 (which is what GM recommended in the vette...)

 

GC CST is 12.1@100*C so yeah, its a VERY HEAVY 30wt, but nowhere near a 40 like people say, never saw a 40 under 13.0.

 

I was just going to mention that the Mobil 5-30 was thicker than the 10-30 at 100 deg C. It appears to remain tru with the EP stuff as well though not by as much. Seems sort of crazty to me.

 

Yep, M1 5W30 EP also has a higher cst@100c than 10W30 EP......

Typical Properties

Mobil 1 Extended Performance

SAE Grade........5W-30 10W-30 15W-50

cSt @ 40º C........61.......66.1.......138
cSt @ 100º C.....11.0......10.7.......18.0

 

ok, so im not to clear on the whole oil thing but i use M1 5w-30 in my car and am curiouse as to know if this is to thin cause ive heard this and i do have some valvetrain noise. sorry for the newbie question, but even though ive been here awhile some of the simple things still kick my ***!

 

5-30 requires more viscosity improvers and shears down a hair more. I went with 10-30 EP as it is probably the most shear-resistant of the line.

 

I use Mobil 1 5w-30 synthetic 92K miles on the clock. NO oil consumption AT ALL! Good oil pressure no valvetrain noise....im

 

I love mobil 1, it's all I'll use

 

I have M1 5-30 in my car and cant complain about the valvetrain noise. Im gonna try this GC 0-30 though just for sharts and giggles.