Why I'm going back to 10w30 in my 3.5 HO Chrysler

[ALS]

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Originally posted by 427Z06:

quote:

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Originally posted by G-Man II:
The 3.5 HO produces 72.3. In fact, the 3.5 HO has a higher specific output than the new 427 CID in the Z06 Corvette. That engine produces just 71.4 HP/liter.

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Big deal. The 3.0L Honda produces 80 HP/liter and still specs 5w20. I'm sure there's plenty of other examples.

However, I think you're making a wise choice.

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Again Big Deal the 2005 S60 Volvo's recommend 5W30 and under extream duty 10W30
The wimpy bottom of the line S60 makes 68 HP per liter, the bottom Turbo model makes 94.4 HP per liter. The T5 S60 makes 107.5 HP per liter and the Top of the Line S60R AWD makes 120 HP per liter. My 1987 740 wagon with a factory Plus kit makes 79 HP per liter using 10W30. $ucks doesn't to out classed by a Volvo.

 

[G-MAN]

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Originally posted by Cutehumor:
I guess you were expecting chrysler to do what ford did. spec 5w-20 for earlier chryslers and they didn't. they stuck with 10w-30 for your engine and you got scared.

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Yeah, that's it...I got scared.

 

[buster]

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Just as with BMW and the M3, Honda and the S2000, Ferrari with the Enzo, and MB with their new upcoming supercar, manufacturers seem to spec higher HTHS oils in engines that are in a higher state of tune than their more sedate powerplants. Honda specs 5w20 across the board, but they require 10w30 in the S2000. BMW spec'd 5w30 across the board, but 10w60 in the M3. "Normal" Ferraris come with 5w30 or 0w40 in them, but 10w60 is required for the Enzo. And if you look at the standard 5.7 Hemi in the Chrysler 300C, 5w20 is spec'd. But in the 425 HP 6.1 liter Hemi in the SRT8 version, Mobil 1 0w40 is spec'd.

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I see where your comming from and I think what your doing is wise, regardless what the other people have posted.

I myself think the X-20wts are fine in engines that call for them, but your examples above have me thinking your right. I've been a pro-20wt member all along, but after reading up on the importance of HT/HS, I've moved back to thinking that maybe sticking with a 30wt is a safe bet. Preferebly an A3/A5 rated oil.


edited one word

[ February 07, 2005, 12:01 AM: Message edited by: 59 Vetteman ]

 

[jbas]

"Bottom line: I can't help but think that Chrysler had a reason for specifying 10w30 for the 3.5 HO and it is no doubt tied to the performance potential of the engine based on its specific output."

Or the manufacturer's concern with "wear," too, however we define it. They (must) know their engine designs best, have tested and experimented with them over months/years before producing them en mass, so it makes sense "XXXXX had a reason for..." I can't figure out why Kia/Hyundai recommends a 10W-40 dino in the their 3.5L-6 cyl at temps over 86 F, but it leaves me "uncomfortable" to go against it, thinking about the long-term. Did they (or Chrysler) come up with that grade arbitarily, or is there something they know or have seen?

 

[1sttruck]

It seems that if one is primarily concerned with 'engine protection'/durability then one should be looking at oil viscosity recommendations outside of the US. If one is primarily concerned about the best possible fuel mileage then use the oils recommended in the US. That's at least one way to try to make sense of the multiple recommendations for the same vehicle in different countries.

 

[Darryl]

G-Man:

I for one am glad to here your update, and any of the reasons why you have come to your conclusion.

If you remember, I drive a Dodge that specs 10w-30. I have been using 5w-20 in the winter, and 10w-30 in the summer (May 1st & Nov 1st oil changes)

This post is the perfect example of why I haven't been here for a long time.

Nothing like posting your fingings or thoughts, and then having to fight it out, and defend yourself to every know it all on the planet.

Darryl

I'll see you guys in another year or so..........maybe.

 

[Jelly]

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Originally posted by Darryl:
Nothing like posting your fingings or thoughts, and then having to fight it out, and defend yourself to every know it all on the planet.

Darryl

I'll see you guys in another year or so..........maybe.

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Geeezzz people...is there something automatically wrong with questioning someone and not accepting everything told to you as the gospel truth?

 

[ALS]

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Originally posted by jbas:
"Bottom line: I can't help but think that Chrysler had a reason for specifying 10w30 for the 3.5 HO and it is no doubt tied to the performance potential of the engine based on its specific output."

Or the manufacturer's concern with "wear," too, however we define it. They (must) know their engine designs best, have tested and experimented with them over months/years before producing them en mass, so it makes sense "XXXXX had a reason for..."

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I have to agree on those statements. These engines have had 100's of thousands of miles of testing on a bench and on the road. Believe me those engines have had hundreds of oil filters cut open, thousands of oil analyis and engines torn down and wear measured through out the parts by people I hope are smarter than most of us. They also have a millions of dollars of equipment to measure wear and friction through out that engine. If they say use 10W30 I would go with it because they have a good reason to believe 10W30 is better than 5W20 for your engine. With the need to squeeze every mile out of a gallon of gasoline something tells me there is a real need in that engine for 10W30.
We may find that these 20 weight oils may back fire on the vehicle owner down the road with long term engine wear. Face it how many people really own a new car past 100K miles. 5 to 15 percent I would guess. Let me add on my comment on 20W oil!
Most people rarely change their oil at recommended OCI's. Most go over the manufactures schedualed mileage on a regular basis. So if they are using a cheap oil they may be having the oil shear down to 15 or even a 10 weight.
Not every car owner hangs out on BITOG.
The service writers at my dealer they told me that there are only about 10 of us that are religious about oil changes at the recommended or before the recommended intervales. That leaves 98% or more who don't give a cow pie about their oil changes.

[ February 07, 2005, 04:00 PM: Message edited by: ALS ]

 

[JoggingGuy]

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Originally posted by G-Man II:
I'm going back to the specified grade of 10w30 and my oil of choice is Pennzoil HM. Using LC my plan is to run this oil until next fall, which will be around 6000 to 7500 miles.

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Hey G-Man,

My wife's car has that 3.5L engine with 70K miles and it's been hard on oil. Gets dirty fast, runs pretty hot, and seems to like thicker oil anyway. It's had a bit of a startup knock that I've been trying to minimize with help from Terry.

I've been running Havoline 5W30 for the first 50K miles and Havoline 10W30 since then. The combo that the engine seems to like most is 10W30 with the LC/#132 Molabrew to thicken things up. That, or straight 10W40. Engine runs quietest with no performance hit with either of those and the analysis looks ok so far. I'm on the AutoRx rinse right now, so I won't be able to do another analysis anytime soon since that car gets only about 2K-3K miles a year now.

 

[Santo Fontana]

Please you guys are babies. This is one of the most civilized forums on the web. Someone disagrees with Gman and him a Darryl go running away crying. G-man usually posts with a certain "attitude". I guess he can dish it but he cant take it.

 

[G-MAN]

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Originally posted by Santo Fontana:
Please you guys are babies. This is one of the most civilized forums on the web. Someone disagrees with Gman and him a Darryl go running away crying. G-man usually posts with a certain "attitude". I guess he can dish it but he cant take it.

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Yeah, that's me. boo-hoo.