PUP beat Driven

[GW’s JL]

The sad thing is you are helpless to get me banned here, feeling so sorry for you grudgy granny!

I don’t want you banned anywhere. You do that on your own. Honestly I’m happy you’re posting oil threads here. It was lacking a bit.

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[Jeep Junkie]

I don’t want you banned anywhere. You do that on your own. Honestly I’m happy you’re posting oil threads here. It was lacking a bit.

I don’t want you banned anywhere. You do that on your own. Honestly I’m happy you’re posting oil threads here. It was lacking a bit.

I'm pretty sure it was you, and that old guy grumpy guy kschachn, he is so old he participated in the Civil War, he's just mad all the time for no reason

 

[jellis4148]

You keep posting, and posting and posting the same crap every other day. The second you learn something new about a different oil it becomes the best and you create a long post about it or a poll. One minute it was Mobil 0W-20 is the best, then HPL, then PUP. Next you started on the different viscosities. Then you send off 500 different oils to be analyzed. Whichever comes back the best is another thread. Then the countless oil changes because you found a new oil made by Shaolin monks from whale blubber that has the best whatever for that day. All this and not counting the countless other random stuff you post. I promise you are not as OCD about your Jeep as I am. I've spent the last 2 months researching 1-ton axles. Made 1 post about and asked a few private questions. I didn't make a new post about them every time I found out something new that made one better than the other.

 

[Pape]

Guys, how about getting back on topic, I know I say often this a discussion forum so let discuss but I think this no longer a discussion.

 

[Jeep Junkie]

I don’t want you banned anywhere. You do that on your own. Honestly I’m happy you’re posting oil threads here. It was lacking a bit.

Hey tell me something, can a UOA tell if a thicker oil hurt the engine in some way? Like my UOA on AFE 0W-30 looked awesome. Is there a possibility that the thicker oil hurt my engine in some way but it didn't show up on the UOA?
Next time I will buy a magnifying glass and analyze my used oil filter with it

 

[JT23JL]

Not me, in 25,000 miles on my Jeep, I must have changed my oil at least 15 times. Oil goes in clean and comes out clean

If the oil you use is so great, why do you change it so often?

My 2002 Tahoe has driven over 312,000 miles. The average oil change interval has been 7,100 miles. Nine times I have driven over 10,000 miles before changing the oil.

I have used a variety of oil brands. Mobil-1 was used 30% of the time. Wal-Mart's SuperTech was used 43% of the time and for the last 150,000 miles. All of the oil was 5W-30 synthetic. My engine runs great.

You are overthinking this oil thing.

 

[GW’s JL]

Hey tell me something, can a UOA tell if a thicker oil hurt the engine in some way? Like my UOA on AFE 0W-30 looked awesome. Is there a possibility that the thicker oil hurt my engine in some way but it didn't show up on the UOA?
Next time I will buy a magnifying glass and analyze my used oil filter with it

Your major concern is always the W rating for cold starts. If the oil is not pumpable at cold starts wear can occur and can show up on a UOA. Since you’re using a 0W your covered to around-30f.

Always remember if an oil is pumpable it’s where it needs to be in a pressurized oil system with a PD oil pump. Engineers will tell you it’s ok to lower the W rating and raise the grade but not to raise the W rating and lower the grade.

“Generally speaking, it’s inadvisable to increase the first number or decrease the second number in an engine oil’s viscosity, because it introduces the engine to a viscosity it isn’t designed for. However, increasing the second number isn’t as risky since the whole operating range of 0W-40 oil is within the operating range of 0W-20 oil.”

 

[Jeep Junkie]

Your major concern is always the W rating for cold starts. If the oil is not pumpable at cold starts wear can occur and can show up on a UOA. Since you’re using a 0W your covered to around-30f.

Always remember if an oil is pumpable it’s where it needs to be in a pressurized oil system with a PD oil pump. Engineers will tell you it’s ok to lower the W rating and raise the grade but not to raise the W rating and lower the grade.

Positive displacement oil pump takes a chunk of oil and throws it inside the engine, from there on it is gravity and upto the oil to make it to all the places. A 0W-20 and 0W-40 will behave very differently inside the engine. What am I missing?

 

[Jeep Junkie]

Your major concern Engineers will tell you it’s ok to lower the W rating and raise the grade but not to raise the W rating and lower the grade.

Yes, Mobil says this about AFE 0W-30. But notice they don't recommend AFE 0W-30 in 5W-20 applications.

 

[GW’s JL]

Positive displacement oil pump takes a chunk of oil and throws it inside the engine, from there on it is gravity and upto the oil to make it to all the places. A 0W-20 and 0W-40 will behave very differently inside the engine. What am I missing?

From an engineer.
“Generally speaking, it’s inadvisable to increase the first number or decrease the second number in an engine oil’s viscosity, because it introduces the engine to a viscosity it isn’t designed for. However, increasing the second number isn’t as risky since the whole operating range of 0W-40 oil is within the operating range of 0W-20 oil.”

 

[Jeep Junkie]

From an engineer.
“Generally speaking, it’s inadvisable to increase the first number or decrease the second number in an engine oil’s viscosity, because it introduces the engine to a viscosity it isn’t designed for. However, increasing the second number isn’t as risky since the whole operating range of 0W-40 oil is within the operating range of 0W-20 oil.”

That sounds like that guy engineering explained's words on Youtube. Note he says not as risky, so there is some risk

 

[jellis4148]

Positive displacement oil pump takes a chunk of oil and throws it inside the engine, from there on it is gravity and upto the oil to make it to all the places. A 0W-20 and 0W-40 will behave very differently inside the engine. What am I missing?

I don’t know what you’re missing. Maybe you should watch a video, send about 15 more different oils to be analyzed then creat 200 more threads. Don’t forget to make 30% of them polls with videos attached and screenshots from your mechanic.

 

[GW’s JL]

Another thing to remember is an oil’s viscosity is more impacted by oil temperature than whats printed on the bottle. So in Alaska a 20 grade that never goes over 170f is thicker than a 40 grade in Death Valley. If engines were built viscosity sensitive our friends in temperature extremes would be in serious trouble. That’s why engines have to be designed to operate everywhere.

 

[GW’s JL]

That sounds like that guy engineering explained's words on Youtube. Note he says not as risky, so there is some risk

I always tell people if you’re not comfortable it’s best to get everything done at the dealer. For the rest of us we run what we feel is best for our situation. My oil temps reach 250f off road so I choose a high quality 30 grade. If I was a normal driver with oil temps mostly below 220f I’d be fine with 0W-20. Most of my Jeep club run 0W-40 because they beat the snot out of their engines in mud pits….

 

[GW’s JL]

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