Found my perfect mix

[thunderchild]

Just changed the oil in my Durango this weekend. As some know, I have a stash of PP 10w30 and 5w-20. Well, since the winter is coming I decided to try a little experiment. My truck holds 6.5 quarts. I am now using 4 quarts of PP 5w-20 with 2.6 quarts of PP 10w-30. I drive 100 miles a day so I am feeling a difference the way my truck responds. The engine seems to spin alot easier when I step on the gas. It is also alot quieter. I don't hear the slight ticking I used to hear. It is gone totally. I have also come to some conclusions as well. I have decided I am not going to go to 10K OCI's. I am very comfortable with my 5K, so I am going to stay there. Also, I am not going to go to 10K with my oil filter. I read on the oil filter board about non-synthetic fibers breaking down over time. Well, my Amsoil filters have celulose in them. It is derived from wood so 5K for the filters it is. The truck seems to run cooler also. Just a bit, but I noticed it on the way from work last night. I am liking this mix. I think when the weather get's warm again, I am going switch to 4 quarts 10w-30 and 2.5 quarts of 5w-20. What do you think?

Oh yeah, I have the 4.7 liter engine with 80K miles now.

 

[Triple_Se7en]

Everything in your post makes logical sense except the "quieter" sensation. Donpt know how one can go thinner & increase quietness.

Perhaps you are correct & some fine BITOG memebers here can help me find the "thinner is quieter" light switch.

I'm really in the dark about this!

 

[ewetho]

Chrysler hydraulic lifters are noisy and the ability of the 5W-20 to get into them easier sometimes helps from what I am reading about neons and guys using it their older engines.

 

[427Z06]

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Everything in your post makes logical sense except the "quieter" sensation. Donpt know how one can go thinner & increase quietness.

Perhaps you are correct & some fine BITOG memebers here can help me find the "thinner is quieter" light switch.

I'm really in the dark about this!

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What makes the thicker=quieter logical? Water is a lot thicker than air and trasmits sound much more efficiently. And one can tell little about how an oil will perform in the elastohydrodynamic regime from the kinematic viscosity.

 

[thunderchild]

Well, after 3 days of driving with my new mix I can tell you that not only is it quieter, but it does rev up quicker as well. Driving on the highway, when I put my foot down to pass, it jumps right into the groove and moves out stronger. I am really starting to like this 5w-20. was not sure about it reading alot of what people were saying about thinner oil. But now after using it first hand, I must say that I am impressed with it's performance in my truck. This will of course lead to some hoarding of the new oil, I am sure.

>8^)>

 

[Triple_Se7en]

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Everything in your post makes logical sense except the "quieter" sensation. Donpt know how one can go thinner & increase quietness.

Perhaps you are correct & some fine BITOG memebers here can help me find the "thinner is quieter" light switch.

I'm really in the dark about this!

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What makes the thicker=quieter logical? Water is a lot thicker than air and trasmits sound much more efficiently. And one can tell little about how an oil will perform in the elastohydrodynamic regime from the kinematic viscosity.

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You & I have both read countless posts here at BITOG where posters who use the 10W-40s and 15W-40s are experiencing a quieter engine - when noise issues occur.

If we can't believe that many accounts (100+) -- then they all must be liars.

 

[thunderchild]

Well, as I said earlier, my lifters quieted down after I mixed in the 5w-20. I was using straight 10w30 and they had a slight ticking. Now with the addition of the 5w-20, the engine is almost silent when I am sitting at a light. Also now that it is getting much colder here, I don't have the sluggishness that was present in my early morning jaunt to work before the engine warmed up. It now feels like the oil is flowing right away through the engine and it is much smoother, quicker after I start it up.

 

[sw99]

Are you planning to do a UOA done on this mixture? I have the 3.7L and was thinking of mixing my 5w20 MC oil with some 10w30 Maxlife. I just dont want to harm the engine since I only have 14k on it.

 

[Triple_Se7en]

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Are you planning to do a UOA done on this mixture? I have the 3.7L and was thinking of mixing my 5w20 MC oil with some 10w30 Maxlife. I just dont want to harm the engine since I only have 14k on it.

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You are rolling the "sudden new consumption dice" mixing different brands in a newish engine. Best to mix using the same manufacturer brand... just different viscosities.

Some vehicle owners experienced consumption after mixing different brands - some didn't. I wouldn't do it - if it were my 14K vehicle. That's just me thou - I steer clear of casinos or card parties as a rule anyways.

 

[Max_Wander]

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Are you planning to do a UOA done on this mixture? I have the 3.7L and was thinking of mixing my 5w20 MC oil with some 10w30 Maxlife. I just dont want to harm the engine since I only have 14k on it.

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You are rolling the "sudden new consumption dice" mixing different brands in a newish engine. Best to mix using the same manufacturer brand... just different viscosities.

Some vehicle owners experienced consumption after mixing different brands - some didn't. I wouldn't do it - if it were my 14K vehicle. That's just me thou - I steer clear of casinos or card parties as a rule anyways.

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I'm a big mixer and have never encountered increased consumption based on mixing different "brands".

 

[ARB1977]

Why not just go to a 0W30 or a 5W30?

 

[sw99]

Quote:

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You are rolling the "sudden new consumption dice" mixing different brands in a newish engine. Best to mix using the same manufacturer brand... just different viscosities.

Some vehicle owners experienced consumption after mixing different brands - some didn't. I wouldn't do it - if it were my 14K vehicle. That's just me thou - I steer clear of casinos or card parties as a rule anyways.

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Hmmm, now you have me paranoid. I may as well rack up some mile before I try this. I have done this on my other 4.0L Jeep since it had 40K on the ticker. Maybe the hight milage had something to do with it, maybe not...

Just to be safe, I will probably run out to the end of the warrenty before I do this (36K).

 

[double vanos]

Just yesterday I cleaared out a bunch of Castrol Syntec oils I had by throwing them all in my wife's 2002 Tahoe. Here's the mix - all Castrol Syntec ...2qts 5w50, 1qt 5w30, 1qt 5w20, 1qt 0w30 (GC) and 1qt BMW 5w30 synthetic. I have new oil pressure readings ...65psi idling and 80psi running. Engine is quieter than than it has every been it's whole life!!!

 

[thunderchild]

I only mix same brand oils. Even though this is my first time. I think it would be OK. Different viscosities/same brand should hurt nothing. I don't use 0w-30 because I am trying to use what I already have in my overstocked stash. I need some more room to buy some new oils so I am using up what has been sitting in there for awhile. Once I make enough room I am going to restock. My trucknow on 2 the second week with this mix, is running smooth as silk. I will be doing this for awhile as I can see no ill effects from it.