Yes I thank you and look forward to the first restful nights sleep in decades.
Does 5W-30 REALLY protect better than 5W-20?
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Correct. In the end, it's about "strength", which holds the MOFT together. Bee Honey would not cut it.
Would an equal base stock formulation of a 20W vs a 30W which would have the highest strength is the answer we are looking for? I just want to keep the parts separated during my most severe operation of the engine I will encounter. If the parts aren't separated then metal to metal contact would cause destructive friction.
Nope ... film thickness/MOFT is determined by viscosity. Film strenght doesn't "hold" anything "together".
Film strength is determined by AW/AF additives. Film thickness prevents parts from touching in the first place, and film strength helps reduce wear when the parts are actually rubbing together after MOFT went to zero.
You want firm thickness as the main way to prevent wear, and film strength as the "backup" to help reduce wear when parts are touching/rubbing. Read the article.
I really don't know. Tribology exists for a reason. Could be 40.
Are you just saying the same thing I said? "In the end...holds the MOFT together" meaning, when the MOFT is going to hell. I read the article, and many more elemental physics ones before that. Not a tribologist by any stretch of the imagination, but I DO know what viscosity is.
That wasn't my point. My point was do you want zero headroom to keep parts separated, or more headroom (ie, more MOFT)? xW-20 might keep parts separated most of the time, but xW-30 and xW-40 will help ensure parts stay separated better. IMO, more headroom to prevent metal-to-metal contact is better than not.
"Holding MOFT together" is a stange way to say it. You either have adequate MOFT due to viscosity or you don't - film strenght has nothing to do with film thickness/MOFT. If you lose all film thickness (ie MOFT goes to zero), you better have good AW/AF additives (film strength) to help miitigate wear as parts rub on each other.
pipe Quit while you're on-top!But 5w20 is less affected by gravitational pull thus lubricating the top end more effectively
I just follow the owner's manual for mine. It states higher viscosity engine oils are "required" for satisfactory lubrication in hot weather. This is one reason I have run Pennzoil Platinum 5w-30 or Chevron Supreme 10w-30 during summer. I think some people are geared toward satisfactory lubrication. Some fuel economy. Most don't care. Recently needed to replace the battery on my Elantra. The lady of the house said "I did not know it had a battery?". I would guess most people are in the category of knowing very little about lubrication and just follow whatever someone tells them.
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It’s important that consumers don’t realize thin oils are related to fuel economy
These days I don't even worry about it. I use what the manufacturer recommends and go on. The engine is only one component and will in most cases outlive everything else on the car.
I would say that with these newer vehicles, some type of electrical problem or the inability to get electrical components or at least good quality ones will be what sends the vehicle to the scrap yard.
I would say that with these newer vehicles, some type of electrical problem or the inability to get electrical components or at least good quality ones will be what sends the vehicle to the scrap yard.
The 2021 Elantra Manual now recommends 0w-20, 5k severe service and 8k normal oil changes. My take is Hyundai took a longer time to catch up with the trend of other car companies. From my perspective the main thing is using synthetic oil for better protection.
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And interesting use of Mobil 1’s GM targeted ATF in his Ford !
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