Synthetic Oil

[HEMIMANN]

And here we are told they are lubed for life.

The implication is expected lifespan, what they mean is warranty period. 60k miles.

 

[Hemi395]

"Lifetime"

 

[TC]

150,458 miles. Ran one bottle of SI1 cleaner at 145k another at 149 k miles. #3 cylinder with misfire code shortly after purchase for what it’s worth. Did not get before pics

 

[Burla]

150,458 miles. Ran one bottle of SI1 cleaner at 145k another at 149 k miles. #3 cylinder with misfire code shortly after purchase for what it’s worth. Did not get before pics
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Thanks for those, is there a way to make the light at the end of scope brighter? I had a similar issue where the time before my lense wasn't clean, but it looks dark.

 

[Wild one]

150,458 miles. Ran one bottle of SI1 cleaner at 145k another at 149 k miles. #3 cylinder with misfire code shortly after purchase for what it’s worth. Did not get before pics
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Pull both plugs and use a small pocket flashlight to shine in the plug hole that doesn't have the scope stuck in it

 

[Burla]

@ramffml so we are good now, no way is 4k viscosity difference at -35 similar performance? Your graph 0w20 versus 0w40, you cant get a 40 weight to flow like a 20 at those temps. Interesting their viscosity graph, as you can see they do it exactly the same punch in two values room temp and 212f. Where in my opinion it lacks credulity if you see where 5w20 ends near 5w40 at -35, so since you have a good relationship with hpl, I'd pose that question. I have seen some cold graphs different conclusion, I'd ask them also if they know for a fact their graph is 100% accurate at -35. I'd ask if that is an hpl specific tool or is regular viscosity tool.

 

[ramffml]

@ramffml so we are good now, no way is 4k viscosity difference at -35 similar performance? Your graph 0w20 versus 0w40, you cant get a 40 weight to flow like a 20 at those temps. Interesting their viscosity graph, as you can see they do it exactly the same punch in two values room temp and 212f. Where in my opinion it lacks credulity if you see where 5w20 ends near 5w40 at -35, so since you have a good relationship with hpl, I'd pose that question. I have seen some cold graphs different conclusion, I'd ask them also if they know for a fact their graph is 100% accurate at -35. I'd ask if that is an hpl specific tool or is regular viscosity tool.

The thing I was suggesting (and could be wrong), is that any 0w-X will perform better at cold temps than any 5w-X. The graph below shows this to be true for this specific oil anyway. Yes the 0w-40 performs worse than the 0w-20, that's expected, but its still performing better than 5w-20 at all temps below -20C/-4F. The 0w-40 fits right in between 0w-20 and 5w-20 at -35C.

I will try to find some more graphs for different oils.

 

[ramffml]

This is Redline High Performance, very interesting, looks like you are right in this case.

Going to try and find another oil for kicks.

 

[Burla]

Wow, good job so big news there is no universal truth where you (and me) think there might be. Which is why I ask questions and never just call it out as a lie, because I don't believe that. I believe the stats, but I believe there is a reason, and that would be good to know. It is hard for me to believe the 0w20/5w20 redline difference at -35, but I'm gonna say you are right unless I can find something out. Sadly my resource no longer works there, lol.

 

[ramffml]

Here is Amsoil SS, two differences, couldn't find spec for 5w-40 so used 5w-50. And this one has that neat crossover again, except it happens at -35C or so so I dropped the curve to -50 to see the effect.

Very fascinating but I have no idea whats going on.

 

[ramffml]

Wow, good job so big news there is no universal truth where you (and me) think there might be. Which is why I ask questions and never just call it out as a lie, because I don't believe that. I believe the stats, but I believe there is a reason, and that would be good to know. It is hard for me to believe the 0w20/5w20 redline difference at -35, but I'm gonna say you are right unless I can find something out. Sadly my resource no longer works there, lol.

This is why I wondered if its just a "curve fitting" thing. Curve fitting is when you have a few data points and you try to map a mathematical function on top of the data to project/determine what the missing points in between would be. If you pick a linear function you get a straight line between the two points and all the projected points are somewhere on that line. This looks like an exponential function of some sort (I've long forgotten this stuff), but the function used here to display these graphs doesn't mean that they got the values right at -35 or -50, it's just a projection.

 

[Burla]

This is why I wondered if its just a "curve fitting" thing. Curve fitting is when you have a few data points and you try to map a mathematical function on top of the data to project/determine what the missing points in between would be. If you pick a linear function you get a straight line between the two points and all the projected points are somewhere on that line. This looks like an exponential function of some sort (I've long forgotten this stuff), but the function used here to display these graphs doesn't mean that they got the values right at -35 or -50, it's just a projection.

maybe if you map some more oils, a truth will start to reveal itself, especially the mi's.

 

[ramffml]

I found this quote from Shannow over on BITOG:

There's an ASTM that uses a log equation to calculate the viscosities at different temperatures, and these calculators use that.

The charts from people like shell which show the straight lines on the log paper don't go past -10 to -20C due to all the effects described above.

I use this app...
https://play.google.com/store/apps/details?id=se.assalub.viscosityapp&hl=en

MotoTribologist's point is a good one too...for example if you find a paper with KV100 and KV150 (rare but they are out there) the error in 9.1 and 4.5 cst (respectively as an example) makes the KV40 number stupidly inaccurate...

swinging a -10C number off the KV40 Kv100 is going to similarly push that mark.

Some BITOGers believe them accurate down to -30 or -40 to support their mixing beliefs, but they are pretty well delusional.

Emphasis mine.

Well dang, guess none of what I did was helpful.

Entire thread for those that still have access:

https://bobistheoilguy.com/forums/threads/online-viscosity-calculators.270773/

 

[Burla]

Another thing I'm sure you figured this out, there is a very large problem with finding how an oil cold performance is because there is no measure of viscosity at what is needed, such as say -10 to 40f, not c, but actually where most cold trucks start most of the time.

 

[huntergreen]

At the turn of the century me and the wife had 3 chevy's, all three were legal lemons and not for drivetrain stuff, just stupid stuff. I won 13k against one of them in court. Malibu, Silverado, and an avalanche, all serious melons with dangerous moldy AC in all of them. The Malibu actually leaked gas in the neck, lol. Never again, Chevy is a cus in my house, the wife feels the same. Now, with everyone going to cvt we cant find our next vehicle, cause I really don't want that. Anyone know an entry level SUV non cvt under 30k? In this town, same dealer Chevy and dodge, bought two dodges and other then hemi tick and a lil shudder in trans it has been a good truck, and of course we found some fixes not too much pain. My other ram was great but bad knee prevented me from using a manual, now the knee is fixed, damn. 2500 Cummins with manual, damn. True story, I bought from dealer and traded it for more then I paid by 500 bucks.

Mazda has an older style six speed trans if I’m not mistaken. Kia/ Hyundai still use conventional transmissions. A bit of a skeptic on the Korean brand, but they have a pretty decent warranty.

 

[Dan Topp]

No matter what new car or truck you buy it seems like the problems soon start showing up in the owner forums.But I’m glad I wasn’t able to buy a new car during the 80s and 90s,the used ones were real dogs.Especially the 301 GM v8

 

[HEMIMANN]

HPL curves show significantly less viscosity in arctic temps within the same SAE viscosity grades (0W and 5W).

We know high ester oils have stiffer VI's which is why they are so good at high temps (jet engine turbine bearings) but not so good at low temps, and also for sliding wear.

I don't know how much of a factor ester oils polar surface wetting affinity helps retain film on Hemi rollers and cams.
I'm still tempted to go HPL SuperCar 0W-30 year around. Best flow, best cold flow, lots of moly, shear stable vii additive, lower wear due to all PAO base oil.
What's not to like?

 

[Stefan N]

No matter what new car or truck you buy it seems like the problems soon start showing up in the owner forums.But I’m glad I wasn’t able to buy a new car during the 80s and 90s,the used ones were real dogs.Especially the 301 GM v8

I have an old 1990 Mercedes 230e as an extra car, that thing is made to last for ever!
I use 10w40 in that thing and odometer says 211.000miles

 

[Dan Topp]

I have an old 1990 Mercedes 230e as an extra car, that thing is made to last for ever!
I use 10w40 in that thing and odometer says 211.000miles
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If I could have latched onto that beauty the salty winters would have done it in.

 

[Stefan N]

If I could have latched onto that beauty the salty winters would have done it in.

Yea, salt is a killer of cars. But this one is used so rarely now days so it will last forever sitting inside. It had a respray in 2005 when my father wanted to use it and I got my first full size pickup. So it has been in the family for 20+ years