What oil are you guys using?
06-16-2014, 07:11 AM
#21
JK Junkie
Have used Mobile 1 0W-30 since new. Last week I tried the new Penzoil Ultimate Synthetic 5W-30. I will be going back to the Mobile 1 long before the recommended oil change interval. I am going to put 500 miles on this Penzoil then look at sending off a sample for analysis. I'm not impressed with it. After going back to the Mobile 1 I plan to do the same just to find out if I'm hearing things.
What do you expect the oil analysis to show or not show?
(Are you using the new pure plus GTL pennzoil, ultra or platinum?)
My 3.8 has has a steady diet of M1, 5w-20 since I drained the factory fill. But I couldn't resist the fuel rewards promo so I am currently running the platinum pure plus 5w-20. Can't really feel or hear a difference. All I really hear is the injectors. After 1,000 miles it's staying steady on the dipstick (but so did the M1).
06-16-2014, 07:25 AM
#22
JK Junkie
Not that the motorcraft oil would let you down, it's good stuff too.
06-16-2014, 09:04 AM
#23
JK Enthusiast
Join Date: Dec 2012
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I just put six quarts of Synthetic 5-20w Valvoline and a 'premium' Mobile 1 oil filter. Not sure what I expected to happen but it continues to operate the same after 62,000+ miles. Maybe next oil change I'll get the flux capacitor working. Just need some plutonium and 1.21 gigawatts of power!
06-16-2014, 09:40 AM
#24
JK Newbie
Join Date: Feb 2014
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Amsoil Signature 5w-30 and a Wix filter will be it's diet for eternity 
. Even with the mild built LS1 that's going in soon.
Not that the new engine was what I considered "loud", but changing the oil dropped 90% of the valvetrain noise.
. Even with the mild built LS1 that's going in soon. Not that the new engine was what I considered "loud", but changing the oil dropped 90% of the valvetrain noise.
06-16-2014, 11:31 AM
#26
JK Junkie
But that filter, not so much. That's more of a 3,000 mile filter.
Now, the new XG 3614 ultra filters, you could leave one on for two of those oil intervals.
06-16-2014, 02:31 PM
#27
JK Enthusiast
Join Date: Jul 2012
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This noise only occurs at start up from a cold engine. Very noticeable valve noise for about 3 seconds. It started right after I swapped to Penzoil Platinum Full Synthetic with pure plus technology SAE 5W-30. It was so startling that I shut the engine off and jumped out to check the oil. My Jeep sits for normally 2-3 days in between trips, so this is a common startup condition for me. Being logical, I realize this may not have anything to do with the oil at all. This could be me just starting to see signs of the head issue since I still have the AB heads. This could be simply do to the 5W vs 0W that I had been running and not the brand. Thinking that possibly the thicker while cool 5W takes slightly longer to flow to the heads, meaning the other did the same but a slight time difference is enough for me to perceive it differently. Maybe the Mobile 1 formulation leaves better residual lubrication after oil run off while sitting that makes this noise less noticeable.
The thought of oil analysis is to see what metals are in it. If they are very different amounts over the same mileage and driving conditions, then in theory the one with less metal would indicate less wear occurring during the testing period. Granted this is not the ideal scientific test due to so many variables and would not be a good indicator of any other vehicles results, it is simply to look at my particular scenario. If the differences between the two results are statistically indistinguishable then it would indicate that both oils are performing as desired and that the noise is merely due to viscosity and that the same grade of Penzoil would sound the same.
The thought of oil analysis is to see what metals are in it. If they are very different amounts over the same mileage and driving conditions, then in theory the one with less metal would indicate less wear occurring during the testing period. Granted this is not the ideal scientific test due to so many variables and would not be a good indicator of any other vehicles results, it is simply to look at my particular scenario. If the differences between the two results are statistically indistinguishable then it would indicate that both oils are performing as desired and that the noise is merely due to viscosity and that the same grade of Penzoil would sound the same.
06-16-2014, 03:56 PM
#29
JK Junkie
This noise only occurs at start up from a cold engine. Very noticeable valve noise for about 3 seconds. It started right after I swapped to Penzoil Platinum Full Synthetic with pure plus technology SAE 5W-30. It was so startling that I shut the engine off and jumped out to check the oil. My Jeep sits for normally 2-3 days in between trips, so this is a common startup condition for me. Being logical, I realize this may not have anything to do with the oil at all. This could be me just starting to see signs of the head issue since I still have the AB heads. This could be simply do to the 5W vs 0W that I had been running and not the brand. Thinking that possibly the thicker while cool 5W takes slightly longer to flow to the heads, meaning the other did the same but a slight time difference is enough for me to perceive it differently. Maybe the Mobile 1 formulation leaves better residual lubrication after oil run off while sitting that makes this noise less noticeable. The thought of oil analysis is to see what metals are in it. If they are very different amounts over the same mileage and driving conditions, then in theory the one with less metal would indicate less wear occurring during the testing period. Granted this is not the ideal scientific test due to so many variables and would not be a good indicator of any other vehicles results, it is simply to look at my particular scenario. If the differences between the two results are statistically indistinguishable then it would indicate that both oils are performing as desired and that the noise is merely due to viscosity and that the same grade of Penzoil would sound the same.
If you had a 3.8 I'd say maybe your oil filter had a bad anti-drain back valve.
On the bright side, top quality oils like you use have great anti-wear agents in the additive packs to protect during boundary lubrication events.
Good luck with it. I hope it's not the head issue.
