0W-20/40 Oil

[07-SRT]

Originally Posted by Russell James

Yeah, that HR4 is good stuff.

The only time Chevy recommends a 0 weight oil is in temps below -20F. In summer temps I would see no reason for it. That HR4 10w30 I think is a wise choice for a hot rodded LS motor.

If I ever move to Alaska, i'll be looking hard at those 0 weight oils. Not.

Gm recommends 0w-40 or 5w-40 for track use in 6th gen Camaro LT-1 its in the manual...

[L99CAMA2011]

Originally Posted by 07-SRT

Gm recommends 0w-40 or 5w-40 for track use in 6th gen Camaro LT-1 its in the manual...

Then Driven DT-40 5w40 it is my brother.

[Camaro Dude]

Internal LT1 hardware and tolerances, are not same as the LS3's.

Oh, and newest cars must pass even more stringent cold start emissions, fuel Econ requirements, etc.

[L99CAMA2011]

Originally Posted by Camaro Dude

Internal LT1 hardware and tolerances, are not same as the LS3's.

Oh, and newest cars must pass even more stringent cold start emissions, fuel Econ requirements, etc.

Opps. Yeah. Also this maybe too much zinc for the cats.

[07-SRT]

Originally Posted by Camaro Dude

Internal LT1 hardware and tolerances, are not same as the LS3's.

Oh, and newest cars must pass even more stringent cold start emissions, fuel Econ requirements, etc.

I know...My reference was to the oil that GM Still has a factory fill of 5w-30 yet the fact that GM recommends a 0w-40 when beating on the car for track use.

[Kopterman]

I run Mobil 1 0w-40 now recommended by my tuner/builder after my cam & supercharger was installed.

[ChibiBlackSheep]

Originally Posted by olblue75

So with all the above being said how would a 0w-xx work in a daily driver / ocassional track car???

You typically want the oil to flow the most when the engine is cold, so a lot of people who live in very cold temperatures are switching their daily to 0w-XX so that on cold mornings, the oil is flowing faster and not waiting to warm up slightly before moving through the engine.

I switched down from 10w to 5w on cars, but never saw the need to pay a premium to switch down to 0w for the dailies that I have.

[Camaro Dude]

Originally Posted by 07-SRT

I know...My reference was to the oil that GM Still has a factory fill of 5w-30 yet the fact that GM recommends a 0w-40 when beating on the car for track use.

Makes perfect sense to me, but my question is, does GM recommend you chuck that 0W40 oil out after track day, and revert back to 5W30? I'll grout on a limb,and predict nope.

You know where I'm getting that from right? The Z28's LS7 owners manual recommendation of 15W50 for track use, but chuck it out when you are back to your daily driving routine.

I haven't read the Gen6 LT1 owners manual, but I would suspect the 0W40 would work quite well, heading from track back to the street, and dealing with a nice cold start "the day after" if you catch my drift. That said, it would be nice for someone to chime in, to confirm my suspicions.

Here is a little curve ball, food for thought. Based on some oil reports @ BITOG, there are some oils like Mobil's 0W40, that go down in viscosity as the mileage accumulates. Then there are others, e.g. other Group lV's, that get thicker with use!

Ya, I know. lol

[07-SRT]

Yeah I forgot to add that GM spec dexos 2 on track use.Guessing do to high temp of oil during track use..Then 5w-30 during street use. I read some of the 6 Gen are getting up around 270° during track use...For 1/4 mile use my temp never got over 230°.....Im going to go back to 5w-30 next oil change and see what the oil temps are...

[Camaro Dude]

Originally Posted by 07-SRT

Yeah I forgot to add that GM spec dexos 2 on track use.Guessing do to high temp of oil during track use..Then 5w-30 during street use. I read some of the 6 Gen are getting up around 270° during track use...For 1/4 mile use my temp never got over 230°.....Im going to go back to 5w-30 next oil change and see what the oil temps are...

In theory, you should see a slight temperature drop with the 30 weight(assuming it is TRULY thinner than the 40 weight you are now using), even if too small for a needle analog gauge to register it.

Years ago, I was consulting with a Redline Engineer, on what oil to use on my E30 BMW custom stroked turbocharged inline 3.0 at the track. Whilst the engine builder recommended a Mobil 15W50(which was standard viscosity range practice, for high performance German engines in the late 80's early 90's), the engineer at Redline though, was 100% sure I'd see a temperature drop, and less power robbing drag with their 10W40. He was spot on the temperature drop!

Mind you, Redline's Group V formulations, are slightly thicker viscosities than their competitors with same numbers on the bottle, but the best practice of working your way up in viscosity, rather then down, for ones particular application still should apply.

[wakespeak]

Originally Posted by Camaro Dude

In theory, you should see a slight temperature drop with the 30 weight(assuming it is TRULY thinner than the 40 weight you are now using), even if too small for a needle analog gauge to register it.

Years ago, I was consulting with a Redline Engineer, on what oil to use on my E30 BMW custom stroked turbocharged inline 3.0 at the track. Whilst the engine builder recommended a Mobil 15W50(which was standard viscosity range practice, for high performance German engines in the late 80's early 90's), the engineer at Redline though, was 100% sure I'd see a temperature drop, and less power robbing drag with their 10W40. He was spot on the temperature drop!

Mind you, Redline's Group V formulations, are slightly thicker viscosities than their competitors with same numbers on the bottle, but the best practice of working your way up in viscosity, rather then down, for ones particular application still should apply.

The Dexos 2 oil I use in 5w-30 has the same high temp viscosity as the 0w-40 (both HTHS 3.68). Pennzoil Euro L. Look for an ACEA A3 or C3 rating, which requires HTHS of > 3.5. HTHS is measured at 302F.

[Camaro Dude]

Originally Posted by wakespeak

The Dexos 2 oil I use in 5w-30 has the same high temp viscosity as the 0w-40 (both HTHS 3.68). Pennzoil Euro L. Look for an ACEA A3 or C3 rating, which requires HTHS of > 3.5. HTHS is measured at 302F.

I've been wanting to give that oil a whirl for the longest time, based on all of the lab tests, feedback, oil analysis, etc, which all seem quite thumbs up.

Unfortunately(I guess), I store my car for almost as long as I use it, so when I weigh out all of the pros and cons on a scale .........(well not exactly like that, but you catch my drift, lol), Amsoil Z-Rod comes into play, mostly for the storage end of the spectrum.

17000km (10500miles approx.) on the clock, still going strong .