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#3418093 - 07/08/14 10:46 AM 95+ degree travel
opus Offline


Registered: 08/25/04
Posts: 73
Loc: Montana
Have a 1993 Suburban with a 200k, 350 engine. Got a trip from MT to NV next week, lots of up and down and going to be hot. Currently run 10/40w. With temps that high I sure would like to keep the oil viscosity up. Lots of mountains, etc.
I thought Lucas Oil Stabilizer but I see it gets no love here. Any other suggestions? Add a quart of straight weight to the oil change?

What think ye?

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#3418096 - 07/08/14 10:48 AM Re: 95+ degree travel [Re: opus]
Miller88 Online   content


Registered: 04/09/08
Posts: 6786
Loc: Onondaga County
No. Do not use the Lucas. It's just heavy, detergentless oil.

I wouldn't be concerned about the 10w-40 in it. If it's that hot, make sure your radiator hoses are up to par.

Leave what's in there.
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#3418104 - 07/08/14 10:58 AM Re: 95+ degree travel [Re: opus]
Oil Changer Offline


Registered: 08/28/06
Posts: 1413
Loc: Detroit Metro
You will be fine with the 10W-40. If you're itchin' to change the oil before the trip, your choices are almost limitless. SAE 30 or 40, an HDEO 10W-30 like Rotella T5 or Delo. 5 or 15W40 HDEO, an HM 10W30 or 40...like I said, endless. Skip the Lucas. That's what I think.

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#3418106 - 07/08/14 10:59 AM Re: 95+ degree travel [Re: opus]
opus Offline


Registered: 08/25/04
Posts: 73
Loc: Montana
I'll surely skip the Lucas.

You know as well as I do that the oil is going to be water thin after 700+ miles in that weather. I'd have thought a little straight weight would be a good thing.

Radiators, etc are good to go.


Edited by opus (07/08/14 11:00 AM)

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#3418110 - 07/08/14 11:01 AM Re: 95+ degree travel [Re: opus]
Barkleymut Offline


Registered: 01/27/04
Posts: 2444
Loc: Richmond, VA
you will be fine. I drive in mid 90's all summer and never have a problem. Just make sure the radiator is clean and in good shape. The only concern I would have is if you are doing much stop and go driving which I would guess you are not.
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#3418111 - 07/08/14 11:02 AM Re: 95+ degree travel [Re: opus]
JayhawkRoy Offline


Registered: 09/12/04
Posts: 654
Loc: Basehor, KS
Leave things alone. Take some extra coolant and oil with you, just in case, along with whatever normal emergency stuff you carry. The oil you are running will do fine.

Check your oil level daily during the all day driving runs. I prefer a morning and then mid-day oil level check, just to make sure.


Edited by JayhawkRoy (07/08/14 11:03 AM)

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#3418112 - 07/08/14 11:02 AM Re: 95+ degree travel [Re: opus]
rockydee Offline


Registered: 03/09/14
Posts: 151
Loc: VA
If your cooling system is good you have nothing to worry about. Leave the Lucas at your local supplier.

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#3418119 - 07/08/14 11:06 AM Re: 95+ degree travel [Re: opus]
Oil Changer Offline


Registered: 08/28/06
Posts: 1413
Loc: Detroit Metro
No, it will be 30 or 40 grade thin depending on if you put 30 or 40 grade in after 700+ miles in that weather.

As others have already alluded, your brakes, cooling system, and other sub-systems are more important than what's in the oil pan; provided that you are using a quality oil, which I'm sure you are.

Originally Posted By: opus
You know as well as I do that the oil is going to be water thin after 700+ miles in that weather.

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#3418124 - 07/08/14 11:11 AM Re: 95+ degree travel [Re: opus]
OVERKILL Online   content


Registered: 04/28/08
Posts: 26419
Loc: Ontario, Canada
Originally Posted By: opus
I'll surely skip the Lucas.

You know as well as I do that the oil is going to be water thin after 700+ miles in that weather. I'd have thought a little straight weight would be a good thing.

Radiators, etc are good to go.


The oil is not going to be water thin, it'll stabilize at some temperature and stay about the same visc at some point early in the trip. You may thin it a bit more with some heavy-footed hill ascents but you won't know how much unless you are tracking OP/OT with some gauges.

Considering that engine originally spec'd an xW-30 that the OEM would have done extensive testing with, and you've already gone up a grade from there, I don't see a need to be fretting about this.
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#3418127 - 07/08/14 11:12 AM Re: 95+ degree travel [Re: OVERKILL]
opus Offline


Registered: 08/25/04
Posts: 73
Loc: Montana
Well then, thats covered. smile

Thanks for the input.

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#3418144 - 07/08/14 11:32 AM Re: 95+ degree travel [Re: opus]
Turk Offline


Registered: 02/03/06
Posts: 8020
Loc: MN
When is the last time you changed the Coolant?

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#3418159 - 07/08/14 11:50 AM Re: 95+ degree travel [Re: Miller88]
dave5358 Offline


Registered: 04/25/13
Posts: 669
Loc: North Bend
Originally Posted By: Miller88
No. Do not use the Lucas. It's just heavy, detergentless oil. I wouldn't be concerned about the 10w-40 in it. If it's that hot, make sure your radiator hoses are up to par.

+1. Forget the Lucas. Check your cooling system.

You did not indicate what oil you are using. At your next oil change, you might switch to a good synthetic (e.g. Mobil-1). It should be able to withstand any heat issues your engine might generate.
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#3418181 - 07/08/14 12:22 PM Re: 95+ degree travel [Re: opus]
dparm Offline


Registered: 04/19/10
Posts: 12539
Loc: Chicago, IL
Your car is not air cooled. No need to change your oil or go thicker.

Just make sure the car's cooling system is in good working order.
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#3418206 - 07/08/14 12:45 PM Re: 95+ degree travel [Re: opus]
opus Offline


Registered: 08/25/04
Posts: 73
Loc: Montana
Coolant...you're supposed to change coolant?? wink
Synthetic, not with this many miles on it. It'll all end up on the ground probably.

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#3418214 - 07/08/14 12:51 PM Re: 95+ degree travel [Re: opus]
Barkleymut Offline


Registered: 01/27/04
Posts: 2444
Loc: Richmond, VA
Originally Posted By: opus
Well then, thats covered. smile

Thanks for the input.


This thread is far from done smile I would at least inspect the hoses and visually check the coolant.
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#3418217 - 07/08/14 12:52 PM Re: 95+ degree travel [Re: opus]
opus Offline


Registered: 08/25/04
Posts: 73
Loc: Montana
Of course hoses have been checked and so on. I am going to change the coolant though. I think its overdue.

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#3418255 - 07/08/14 01:20 PM Re: 95+ degree travel [Re: opus]
440Magnum Online   content


Registered: 02/01/09
Posts: 6341
Loc: Texas
A 30-weight (5w30, 10w30) is adequate for a smallblock Chevy in any ambient temperature, providing everything is in good shape and it isn't needing to "band-aid" a problem like worn bearings or a weak oil pump. 10w40 is already overkill, no need for anything else. Especially Lucas Mucus, which can lead to foaming problems.

When operating in high ambient temnps (and 95-100 isn't what I'd consider "high" at all) its most important to focus on the cooling system- belts, hoses, radiator clean (both air and coolant passages), coolant condition, radiator cap, fan(s), and overflow tank, etc.
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#3418297 - 07/08/14 01:44 PM Re: 95+ degree travel [Re: opus]
chrisri Online   content


Registered: 06/01/14
Posts: 325
Loc: Fiume,Croatia,EU
Check your battery.If it's old it could let you down in that heat.
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99 FIAT Punto Sporting 16v (Mobil Super 3000x1 5w40)
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#3418357 - 07/08/14 02:25 PM Re: 95+ degree travel [Re: opus]
Vikas Online   content


Registered: 07/22/05
Posts: 8232
Loc: NorthEast
Does Lucas make anything for the cooling system? If yes, add it. That way you will *feel* comfortable.

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#3418394 - 07/08/14 02:56 PM Re: 95+ degree travel [Re: opus]
opus Offline


Registered: 08/25/04
Posts: 73
Loc: Montana
LOL, all is good. Just changing the coolant now and I'll call it good.

[Mental note; next time remove thermostat to speed process].

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#3418407 - 07/08/14 03:06 PM Re: 95+ degree travel [Re: opus]
Turk Offline


Registered: 02/03/06
Posts: 8020
Loc: MN
Originally Posted By: opus
I am going to change the coolant though. I think its overdue.


If it's overdue, yes, change it. thumbsup
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#3418554 - 07/08/14 05:30 PM Re: 95+ degree travel [Re: opus]
Vikas Online   content


Registered: 07/22/05
Posts: 8232
Loc: NorthEast
And make sure you bleed the system properly otherwise you will have more problems than if you leave the coolant alone.

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#3418623 - 07/08/14 06:24 PM Re: 95+ degree travel [Re: opus]
opus Offline


Registered: 08/25/04
Posts: 73
Loc: Montana
We'd always park back end in a ditch and raise the engine to get the air bubbles out. smile

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#3418845 - 07/08/14 08:57 PM Re: 95+ degree travel [Re: opus]
Oil_Flunky Offline


Registered: 06/23/09
Posts: 16
Loc: Michigan
Any weak tires like to blow out when it gets real hot. Make sure the spare is inflated, and your jack is serviceable with all the parts there.
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Oil, you need it. Oil snobbery, you don't need it.

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#3418915 - 07/08/14 09:40 PM Re: 95+ degree travel [Re: opus]
gman2304 Online   content


Registered: 08/11/11
Posts: 733
Loc: n.c.
We all sound like mother hens....just go...and be safe, don't speed, take plenty of clean underwear, send us a post card, and let us know how your oil performed when you get back. geez!

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#3418922 - 07/08/14 09:48 PM Re: 95+ degree travel [Re: opus]
opus Offline


Registered: 08/25/04
Posts: 73
Loc: Montana
No kidding geeeee....

Its all good. For all anyone knows I'm a 20 year old kid thats never turned a wrench. I dont even remember being 20! Just wanted everyones take on it.

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#3419137 - 07/09/14 03:34 AM Re: 95+ degree travel [Re: opus]
Turk Offline


Registered: 02/03/06
Posts: 8020
Loc: MN
Well, at least change the Coolant, "as you said it's overdue"....

That makes sense. Unless people don't make sense anymore...

_________________________
03 GMC Sierra 4x4 200k, M1 TDT
00 Saturn SL2 89 YO Lady Car. 79k Miles! PU
98 Saturn SC2 "Red Hot" PYB + LubeGard + Kreen
97 Camry 207k Maxlife


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#3427046 - 07/16/14 10:41 PM Re: 95+ degree travel [Re: Oil Changer]
another Todd Offline


Registered: 05/15/06
Posts: 1668
Loc: Southern CA
Originally Posted By: Oil Changer
You will be fine with the 10W-40. If you're itchin' to change the oil before the trip, your choices are almost limitless. SAE 30 or 40, an HDEO 10W-30 like Rotella T5 or Delo. 5 or 15W40 HDEO, an HM 10W30 or 40...like I said, endless. Skip the Lucas. That's what I think.


If you are worried I would suggest the HDEO 15-40. Delo 400LE is less than 12 bucks a gallon at Walmart's around here and it is a very robust oil, as are the other HDEO oils.
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