I don't think anyone disagrees with this premise of keeping thinner oil cool can keep the viscosity and film thickness up, which is the main thing that keeps moving parts separated. Got a link to where you say you were "ravaged" by making a similar statement?"Again, it all depends on the use circumstances. Those vehicles you mention may have adequate oil coolers and keep the oil temperatures down. You could run 0W-8 in a vehicle specifying 10W-40 if you kept the oil temperature of the 0W-8 down to where the viscosity was about equal to the 10W-40 at 275 F. It's all about oil temperature, and what the oil's viscosity is at those temperatures, because the viscosity between the moving parts does matter."
Interesting that I said exactly this once and was ravaged by many as being utterly false.
ali
A difference of only 2 deg C inside the journal bearing isn't going to effect the MOFT in the bearing as much as the starting viscosity and HTHS of the oil used - and starting with a higher viscosity in the first place is going to give you that. Not to mention that you have to consider the effect on MOFT due to journal bearing rotational speed - MOFT gets larger with increased RPM due to the bearing trying to center itself more on the journal. A thicker oil would actually matter more in terms of resulting MOFT at very low RPM/high load "lugging" conditions vs a thinner oil because you will lose some MOFT due to bearing rotational speed. Low RPM engine "lugging" under high loads with thinner oil can be more detrimental to journal bearings than lugging with thicker oil. Not good to "lug" engines no matter what, so it's something I try to avoid.As higher grade oils have more internal resistance they heat up more in the bearing area. Whereas a 20 and 30 grade oil will have a different viscosity at 90C they may have the same viscosity when exiting the bearing as the thinner, 20 grade oil will heat up less:
I uninstalled the known faulty OEM plastic oil cooler/filter assembly. I replaced it with a cast aluminum assembly and then installed a Baxter spin on oil filter adapter onto that...
What's so "ravaging" about what was said there?"Got a link to where you say you were "ravaged" by making a similar statement?"
Motul 0W8 Has Same Viscosity as a 40 Grade Oil
...At around 165F. The viscosity should be around 15 and the HTHS should be around 3.5 (plus or minus). My 812 SF generally runs with an oil temperature of 165F while driving at 80 MPH. Ferrari owners manuals often specify a target oil pressure of 70 PSI at 6,000 RPM as being ideal. This oil...bobistheoilguy.com
Ali
People don't like being wrong and called out about itWhat's so "ravaging" about what was said there?
"Got a link to where you say you were "ravaged" by making a similar statement?"
Motul 0W8 Has Same Viscosity as a 40 Grade Oil
...At around 165F. The viscosity should be around 15 and the HTHS should be around 3.5 (plus or minus). My 812 SF generally runs with an oil temperature of 165F while driving at 80 MPH. Ferrari owners manuals often specify a target oil pressure of 70 PSI at 6,000 RPM as being ideal. This oil...bobistheoilguy.com
Ali
... Hydrodynamics and the resulting film thickness between moving parts will always be a function of the fluid viscosity. Tribology 101.
Yep, I bought it at the recommendation of Motorcity Mechanic after checking out his videos. As a Mopar tech, I took his word for it. It was a little more work for me because my JK is a 2012, so it has a slightly different oil cooler/filter adapter. So I actually managed to find a guy who was parting out a 2014 JK and got my hands on that oil cooler. I was then able to transplant the plate cooler portion to the Dorman aluminum housing and installed without any issue. After that, the Baxter unit installs easily into the aperture on the upgraded housing. The whole thing isn't super cheap, but my thought is it's worth it to have that future-proofed on my Jeep.Sweet! I'd like to see how that setup looks.
Did you use the Doorman aluminum housing? I had to google the baxter assembly, but I do recall seeing that posted on another site. Pricey little bugger at ~$379 per their website and the Doorman assembly isn't cheap either, but at $500+ all in, it's still cheaper than having a shop install another OEM plastic style. I've heard of shops charging in excess of $1000 for that job.
Yep, I bought it at the recommendation of Motorcity Mechanic after checking out his videos. As a Mopar tech, I took his word for it.
I kept my old unit just in case, but I feel somewhat confident (hopeful?) that I won't have to dig into the vee of this engine for a while. I suspect the O-rings have about as much chance as failing as the originals, since I'm guessing they're Fel-Pro products. As far as the housing goes, hopefully the casting is nice and solid. *knock on aluminum*I've always enjoyed his channel.
It seems like more and more shops are catching on to replace the oil filter/cooler housing with the Doorman aluminum replacement. That's a great thing. Hopefully more aftermarket companies will make these as well. I guess now we wait and see if there's any other weak spots on the aluminum replacement, like O-rings or the cooler assembly itself.
Not to mention many of the additives require heat to activate.Oil not getting hot enough to evaporate combustion byproducts and consensation build-up in the engine would be a concern. Cooling the oil too much isn't necessarily a good thing.
What's so "ravaging" about what was said there?
There sure are a lot of good posts and information in that thread. Not limited to.. 12, 22, 27, and this one. https://bobistheoilguy.com/forums/t...cosity-as-a-40-grade-oil.350093/#post-5995323
This is post #22 there and it is gold.
"Got a link to where you say you were "ravaged" by making a similar statement?"
Motul 0W8 Has Same Viscosity as a 40 Grade Oil
...At around 165F. The viscosity should be around 15 and the HTHS should be around 3.5 (plus or minus). My 812 SF generally runs with an oil temperature of 165F while driving at 80 MPH. Ferrari owners manuals often specify a target oil pressure of 70 PSI at 6,000 RPM as being ideal. This oil...
bobistheoilguy.com
Ali
With the oil that you are now running in your car now, how would it hold up and what temp would your oil be running if you ran your car like the white Lamborghini in Cannonball Run? It is reasonable to say that if you were running your car on a road course that you would be using a thicker oil.
They pulled all the rods, crank and camshafts to measure all the bearing clearances? That would require a total engine teardown.My Enzo Ferrari of 15 years and 6,000 miles had an engine out service due to an oil seal leak. The innards were well inspected and measured by Ferrari of Tampa Bay. The owner, who owns multiple Ferrari dealerships, liked what he saw. He bought it from me. It (the engine) was said to be in the best condition of all the engines they have seen before. It was run on 20 and 30 grade oils despite having a spec of 10W60 grade oil. Oil anaylisys of all my high powered cars using low viscosity oils is well documented.