What weight oil for older trucks & SUV's?
#1316215
10/06/12 03:03 PM
10/06/12 03:03 PM
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Joined: Jan 2003
Posts: 5,270 Missouri
MY340
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When they pass 100,000 miles. Do you guys switch from the factory 5W-30 to like 10W-30 or 10W-40 year round or just swap to it for summer driving? Just not sure 5W-30 is the best for older motors.
Using the high mileage 5W-30 Castrol GTX in our vehicles as they all have over 75,000 miles on them.
1970 FE5 Duster 360/904/3.91's SOLD
1973 TB3 SpaceDuster 340/4spd/4.10's SOLD
Moparless for now but when the opportunity is right I'll have another one.
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Re: What weight oil for older trucks & SUV's?
[Re: stormer41]
#1316217
10/06/12 03:17 PM
10/06/12 03:17 PM
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Joined: May 2003
Posts: 96,666 On The Boat, On The Lake, Wa. ...
amxautox
Still Retired. Still Posting on Moparts. A Lot.
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Still Retired. Still Posting on Moparts. A Lot.
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Posts: 96,666
On The Boat, On The Lake, Wa. ...
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My Ramcharger has about 250,000 miles and now use 15-40 diesel oil. The van about 235,000 miles and use Valvoline 30 wt.
Tom
"Everyone should believe in something; I believe I'll go fishing."
-Henry David Thoreau
Men and fish are alike. They both get into trouble when they open their mouths
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Re: What weight oil for older trucks & SUV's?
[Re: amxautox]
#1316218
10/06/12 04:33 PM
10/06/12 04:33 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
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About to go away
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Posts: 14,889
up yours
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I run 5w30 in the 318, it came out of my 87 Diplomat and is in my 65 Cuda, over 200k miles and great oil pressure.
You need a good oil pressure gauge and use it to monitor your pressure. Do not go thicker than you need for acceptable pressure, any more just wastes gas.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: What weight oil for older trucks & SUV's?
[Re: Supercuda]
#1316219
10/07/12 03:17 AM
10/07/12 03:17 AM
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Joined: Jan 2003
Posts: 12,043 State of Confusion
hp383
Just a normal tag again
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Just a normal tag again
Joined: Jan 2003
Posts: 12,043
State of Confusion
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I use diesel 15-40 in my stuff, gas or otherwise, I like the extra sink properties.
Join the Penguin Liberation Front!! Stop the Hippo Occupation!
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Re: What weight oil for older trucks & SUV's?
[Re: hp383]
#1316220
10/07/12 05:12 AM
10/07/12 05:12 AM
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Joined: Feb 2003
Posts: 21,318 Manitoba, Canada
DaytonaTurbo
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Too Many Posts
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Posts: 21,318
Manitoba, Canada
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Depends on the truck. For the 90's magnum injected stuff and newer, 100,000 miles is not that much. In my 99 2500 with the cummins, I just did the oil change for the winter and run 5w-40 rotella t6 synthetic. Truck has just shy of 240,000 miles on it and hot oil pressure at idle is great. Synthetic 5w-40 is what the owners manual specifies for our winter temps. The old carbed 4.2 that was(before I yanked it out) in my 88 jeep had low oil pressure. Oil pressure was so low at a warm idle that one lifter would bleed down. Get a little warmer and a second would bleed down. Even in the dead cold of a manitoba winter. Kind of embarrassing at the drive through getting coffee with this thing clacking away like there were elves with hammers inside the engine! Still went 4x4ing with it like that and gave that engine even more abuse. I tried dumping in some thicker oil, it made no difference lifters bled down just like before. After the transmission crapped out I finally pulled that engine! With you being in the south and not having cold winters like here, I would just run the 10w-30 year round and be done with it.
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Re: What weight oil for older trucks & SUV's?
[Re: DaytonaTurbo]
#1316221
10/07/12 05:54 AM
10/07/12 05:54 AM
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Joined: Feb 2005
Posts: 5,796 minnarusta
TX9H6E4CUDA
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minnarusta
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In my Cherokee with 166,xxx miles I run Rotella 15-40 in summer and winter I run Rotella T-6 5-40 for easy starts.
For the absolute best powder coating go to J.I.T powder coating, contact infomation is in my personal profile..
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Re: What weight oil for older trucks & SUV's?
[Re: MY340]
#1316222
10/07/12 09:12 AM
10/07/12 09:12 AM
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Joined: Jan 2003
Posts: 8,941 Holly/MI
Dean_Kuzluzski
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Holly/MI
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I've used 10w30 Valvoline in everything I've owned for 24 years and never a problem. 94 Chevy Caprice - 204k+ 94 GMC - 196K+ 04 Durango - 147k+ (and no broken timing chain yet ) IMO, 5w30 is for better gas mileage. I'll take a few tenth's loss of mileage for the piece of mind.
R.I.P.- Gary "Coop" Davis 02/09/68-05/13/04
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Re: What weight oil for older trucks & SUV's?
[Re: Dean_Kuzluzski]
#1316223
10/07/12 11:44 AM
10/07/12 11:44 AM
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Anonymous
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Anonymous
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Castrol Edge synthetic in 5w-40 is the ticket. Has zinc like the diesel oils do and it has a wider viscosity range for year round use. It is also available in 5w-50 if you want some racing oil type characteristics.
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Re: What weight oil for older trucks & SUV's?
[Re: roadrunner69s]
#1316225
10/07/12 12:19 PM
10/07/12 12:19 PM
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Anonymous
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Anonymous
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Mobil 1 offers a 0w-40 in synthetic and call it European style. I don't think it has any zinc so you wouldn't want to use it in flat tappet cammed motors.
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Re: What weight oil for older trucks & SUV's?
[Re: roadrunner69s]
#1316226
10/07/12 01:13 PM
10/07/12 01:13 PM
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Joined: Feb 2003
Posts: 21,318 Manitoba, Canada
DaytonaTurbo
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
A 5w-20 synthetic oil might perform more like a 3w-20 when compared to 5w-20 dino oils.
My car specifies 5w-20. Since I put on a lot of miles between changes and it sees a lot of cold starts and short trips I run amsoil synthetic in it. I will tell you that oil is almost as thin as water even when cold! I'm sure they spec it for fuel mileage. The engine was designed with that in mind so I have no problem with it.
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