M1 5w30 Cadillac cts 3.6l 11,721 miles

[addyguy]

Just for a note here, we can't buy the 'HM' versions of M1 in Canada at all - it's not sold up here.

M1 labels their regular 10W-30 oil as 'for higher mileage vehicles', but it's NOT actually 'M1 HM' - it's just 10W-30 M1.

Results are decemt - on a high-mileage, higher-performance engine, I wouldn't worry about a bit of consumption - have you heard about how much oil some BMW M-cars consume?

 

[Spykem4e]

Originally Posted By: addyguy
Just for a note here, we can't buy the 'HM' versions of M1 in Canada at all - it's not sold up here.

M1 labels their regular 10W-30 oil as 'for higher mileage vehicles', but it's NOT actually 'M1 HM' - it's just 10W-30 M1.

Results are decemt - on a high-mileage, higher-performance engine, I wouldn't worry about a bit of consumption - have you heard about how much oil some BMW M-cars consume?


Thats what I saw couple minutes ago when I was on the mobil website. We cannot buy any of the high mileage oil 10w30 here in Quebec.

I didn't hear about the oil consumption on the BMW cars. Can you tell me a little bit about it? I was thinking about a used M5 for next year as a second car...

 

[wapacz]

That engine has no coolant running though the intake. So I would think you would have to have something like a head gasket issue to get coolant in the oil. Or a oil cooler that is cooled by the coolant of the car.

 

[addyguy]

The reason your car would have used more M1 10W-30 and PP 5W-30 is that they are thinner - M1 10W-30 is 10.0cst @100C, and PP 5W-30 is 10.3cst @100C. M1 5W-30 is 11.3cst @100C.....so if you are topping off regulary, the 5W-30 is keeping the oil thicker than the other two.

I don't have details on it, but some years of BMW M3 had horrendous consumptio issues, even when using 10W-60 oil. If you check the 'Euro' sub-forum, you'll find threads on it, I'm sure.

 

[d00df00d]

Thin oil can be consumed if it slips past the rings. Thick oil can be consumed if it aerates and causes excess pressure in the crankcase. Viscosity alone doesn't tell the full story.

 

[buster]

Originally Posted By: d00df00d
Thin oil can be consumed if it slips past the rings. Thick oil can be consumed if it aerates and causes excess pressure in the crankcase. Viscosity alone doesn't tell the full story.


Exactly. You can't assume oil consumption is related to just one variable. It's dependent on a lot of variables in many cases. Kv @ 100C is only one small part of it. Plus, you are really only talking about a 1 cSt difference which is not significant.

 

[addyguy]

Ever thought of running M1 0W-40 just to see how it would do?

You'd still get good cold-weather performance, and it's not too thick. Just an idea.........

 

[Spykem4e]

Originally Posted By: addyguy
Ever thought of running M1 0W-40 just to see how it would do?

You'd still get good cold-weather performance, and it's not too thick. Just an idea.........


I'd really want to try the 0w40 but since its not meeting 4718m spec, I'm kinda worried about what is going to happen in the engine. Also, would the vvt will work correctly with a 40w?

The famous 4718m spec, I just don't know why, but only the 3,6l in the 2004 and 2005 cadillc cts, the engine oil has to meet 4718m spec. The 2006 and 2007 has to meet 6094m spec. Can't tell why... If I had to meet 6094m, I would have tried the 0w40 by now.

 

[ARCOgraphite]

The 'Vette syn oil spec, AFAIK. was just for oxidative THICKENING and evap loss/ boiloff seen primarily at amateur track and autocross events. The 10w-30 HM should walk all over the vanilla 5w-30. Dont be afraid. Id worry more about the plain M1 having marginal-to-inadequate additive chemistry for you high performance engine.

 

[tig1]

With an engine with nearly 200,000 miles on it the M1 5-30 held up very well for you. I tried the M1 10-30HM in my old Merc GM 4.6 V8 for two OCIs and it used a little more oil than the M1 5-30. If you can get the 5-30EP where you live you might want to try that. It's been an outstanding oil for me.

 

[JohnBrowning]

First with the work and TB cleaner and such the UOA is not going to be an accurate reflection of the oil and car usage. I would use Esso XD-3 0W30 or 0W40 they should be cheaper in Canada then M1 products and have shown great results in everything we have seen them used in from Canada!I would recomend you do an oil flush at thenect change. I would pick up any of the common engine flush's from your local parts store and run them 15-30 minutes at fast idle then change. This should get any garbageleft behind from your work out of the engine and allow you to get a good reading.

 

[Art_Vandelay]

Originally Posted By: ARCOgraphite
The latest 10w-30 high mileage oil is a whole nouther animal than most M1 products. Its GF3 long life A3 euro spec oil with higher antiwear agents, higher HTHS and the suspected classic full synthetic basestocks since it demonstrates the 'Vandelay -54C pour point'


ARCO, you named the pour point after me! LOL I don't know how I missed this thread.

 

[Nick R]

With almost 120k miles on it your engine is consuming oil at about the same rate as my cavalier does. Nothing to worry about. Glad you lime the car but since you spend so mich time on the road when you get a new car you should look at the mercury milan with the 4 cyl, it gets 34mpg hwy and would be a great cruiser