Shell Rotella T Synthetic 5W-40.
$12.88 a gallon at WalMart.
Gene
$12.88 a gallon at WalMart.
Gene
Cold temps coming (0f), need some oil advice (Jeep 4.0 I6)
- Thread starter DirtyApe
- Start date
- Status
- Joined
- Sep 28, 2002
- Messages
- 39,798
That's what's in both of my Wranglers. My son is doing 15w-40 Delvac 1300 just to see what it yields over the winter in a 7500 UOA.
Keep in mind that the use of a 5w-30 is specifically NOT RECOMMENDED in any jeep engine if the ambient temp is expected to be above 32°F (consult the owners manual). 10w-30 has a (preferred) after it ..and the engine, mostly unchanged for 20+ years ..once spec'd 40 and even 50 weight oil.
Short trippers and infreqent flyers ..the 30's will work well ...highway daily drivers ..stick with the xw-40's.
You have likely changed your oil already but my choices for the 4.0 are M1 0W40 or Rotella T synthetic 5W40.
harbor
Site Donor 2025
My wife's 2 yr old Grand Cherokee with the 4.0L six likes Mobil 1 10W-30 all-year round. Started fine this morning in the northern 'burbs of Detroit with temps just above zero.
The problem with switching to a 5W-30 is that Jeep does recommend against it above 32F, and temp. fluctuations are too dramatic here. For example, it's supposed to be around 40F tomorrow.
JohnBrowning - Where are you at in the thumb? I've got a summer place just south of Harbor Beach on Lake Huron.
The problem with switching to a 5W-30 is that Jeep does recommend against it above 32F, and temp. fluctuations are too dramatic here. For example, it's supposed to be around 40F tomorrow.
JohnBrowning - Where are you at in the thumb? I've got a summer place just south of Harbor Beach on Lake Huron.
GC and sleep well.
Seems like this is the perfect application for M1 T/SUV 5w-40. The M1 0w-40 may work well here too. The Jeep 4.0 is a stout engine but does like a heavy 30wt or a 40wt oil from what I have seen on here.
Well, I decided to go with the new SM rated valvoline durablend 5/30 and will change it out in a couple of months once things get a bit warmer. I'm not planning on any long trips before then, and I anticipate about 2000-3000 miles on this oil before going back to 10w-30 dino pennzoil.
Just saw on the news we are in an area slated to get 8-12" of the white stuff Wednesday and Thursday. Then the deep freeze, nightly lows -5 to 0f Thursday night and about -10 on Christmas morning. We won't get above freezing until next Monday.
Wow. Welcome to winter, eh? This is Southern Illinois, we don't get THAT cold very often..
Just saw on the news we are in an area slated to get 8-12" of the white stuff Wednesday and Thursday. Then the deep freeze, nightly lows -5 to 0f Thursday night and about -10 on Christmas morning. We won't get above freezing until next Monday.
Wow. Welcome to winter, eh? This is Southern Illinois, we don't get THAT cold very often..
Well where I am at right now in Michian in two days the snow has piled up slightly above my knees. It was 9F dureing the day droping down to 0 F last night. This absolute temp. not with windchill etc.... The wind is a solid 25 knot gusting to 35. Winter is not even upon us yet! This still fall.
I have M1R 0W30 in my Camry and it is doing great!The I6 in your Jeep realy likes a 40Wt oil!You could use M1 0W40 and get better cold starting then your current Penzoil 10W30 or 5W30.
After you Auto-Rx it you could also push out the OCI with 0W40 with very little concern.
I have M1R 0W30 in my Camry and it is doing great!The I6 in your Jeep realy likes a 40Wt oil!You could use M1 0W40 and get better cold starting then your current Penzoil 10W30 or 5W30.
After you Auto-Rx it you could also push out the OCI with 0W40 with very little concern.
I'm not sure which owners manual suggests using 5w30 above 32F is not acceptable, but I know that is NOT the case in my '88 owners manual for an XJ with the 4.0.
My owners manual allows the use of 5w30 in ambient temps up to 60 degrees F, not 32F.
It allows 10w30 and 10w40 down to 0 F, no cap on high temps.
20W50 is allowed at 32F and up, no cap on high temps.
All that being said, I run Rotella T Syn 5w40 year around with decent results. No problem starting at -25 F last year. Only been down to -10F so far this year.
My owners manual allows the use of 5w30 in ambient temps up to 60 degrees F, not 32F.
It allows 10w30 and 10w40 down to 0 F, no cap on high temps.
20W50 is allowed at 32F and up, no cap on high temps.
All that being said, I run Rotella T Syn 5w40 year around with decent results. No problem starting at -25 F last year. Only been down to -10F so far this year.
- Joined
- Sep 28, 2002
- Messages
- 39,798
Hmm ..my 99 FSM has it a little different than my owners manual.
10w-30 (preferred) above 0°F (-18°C) with no limit (same as the owners manual
5w-30 100°F and below.
One of these two is "not right". I tend to doubt the 5w-30 # in the FSM.
This same engine spec'd 40 and 50 weight oil at one time.
10w-30 (preferred) above 0°F (-18°C) with no limit (same as the owners manual
5w-30 100°F and below.
One of these two is "not right". I tend to doubt the 5w-30 # in the FSM.
This same engine spec'd 40 and 50 weight oil at one time.
Hey Pat: I was watching The Weather Network this morning on Shaw before leaving for work. Never mind the cold, how about that huge blizzard heading your way? Drive with care!
Patman
Staff member
Yes, we're going to get hit hard tomorrow! Depending on the way the storm tracks before it hits us, we could get a ton of snow, or it could be a mix of snow and rain, or it could be a ton of freezing rain.
I'll be safe though, as I already tucked my Corvette safely away in my parent's garage last night, and borrowed my mom's 2001 VW Golf for the next two days. And if the storm is freezing rain, I won't even bother venturing out at all. Tomorrow is our last day of work before the holiday break anyhow (our company closes from tomorrow until Jan 3rd), so there won't be much work going on anyways.
harbor, You guessed it!! My wife is from Harbor Beach. We met in college.
I wouldn't use a 10W below 0°F. Although, many people have with no apparent harm. I'd at least get a good 5W or 0W30 synthetic. This many be a very cold winter.
It's 7°F here at 7:41PM and will most likely go below 0°F once again tonight. It's been -7°F
(-22°C) here already this year. I use GC 0W30 and my truck is outside. It does crank considerably slower when below 0°F!
It's 7°F here at 7:41PM and will most likely go below 0°F once again tonight. It's been -7°F
(-22°C) here already this year. I use GC 0W30 and my truck is outside. It does crank considerably slower when below 0°F!
During the winter of 1993 we had temps of around
-20. I started my '93 S-10 on 10W-30 Pennzoil and had oil pressure within 20-30 seconds. Left it warmup a couple minutes and I was ready to go. The only problem was when I pushed down the clutch pedal it stayed down! The clutch fluid was a little thick. I had to let it warm up about another 20 minutes 'till it got some heat under the hood.
-20. I started my '93 S-10 on 10W-30 Pennzoil and had oil pressure within 20-30 seconds. Left it warmup a couple minutes and I was ready to go. The only problem was when I pushed down the clutch pedal it stayed down! The clutch fluid was a little thick. I had to let it warm up about another 20 minutes 'till it got some heat under the hood.
If it's been running well with the DuraBlend, all I would do would be to run 5w-30 DB in the winter and 10w-30 DB the rest of the year.
That is standard recommendation for most Chrysler Corp of recent history.
For clarification:
Preferred : 10W-30 But do not use below 0°F
Alternate : 5W-30 But do not use above 100°F
Gene
What ever happened to "global warming?"
- Status
Similar threads
