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#3498 - 07/26/02 12:54 AM 10/40 summer ?
jake Offline


Registered: 06/19/02
Posts: 30
Loc: phx. az.
question, would chevron superme 10/40 be ok to use in summer {120-phx.,pulling trailer,short time,say 400 miles,??? total miles 3000! OR use 10/30? thank's

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#3499 - 07/26/02 01:26 AM Re: 10/40 summer ?
MolaKule Offline


Registered: 06/05/02
Posts: 14644
Loc: Midwest
What type of vehicle are you pulling with? Engine oil cooler, extra (external) tranny cooler?

Right now, if I were pulling anything here in the MidWest (105 F min today [Embarrassed] [Embarrassed] ) I would go with a full synth 10W30 or a 15W40 Blend.

And bring at least one extra spare tire with you!
[Cool]

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#3500 - 07/26/02 02:22 AM Re: 10/40 summer ?
Patman Offline



Registered: 05/27/02
Posts: 19287
Loc: Oakville, Ontario
I agree with Molekule, a good 10w30 or 15w40 would be the better choice, as it would have less VII than 10w40 would.

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#3501 - 07/26/02 03:19 AM Re: 10/40 summer ?
satterfi Offline


Registered: 06/20/02
Posts: 903
Loc: CA
Patman

More that once you've stated 10w40 has more VII than 10w30.

That might be true in some cases but I doubt it's true in all cases.

Does Redline or Amsoil 10w40 have more VII than Maxlife 10w30 or Shaefers 15w40? I don't know. I'd hope the best full syns in the 10w40 grades have less VIIs than a dino 10w30 or blend 15w40.

I doubt I'll ever know for sure.

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#3502 - 07/26/02 05:29 AM Re: 10/40 summer ?
Patman Offline



Registered: 05/27/02
Posts: 19287
Loc: Oakville, Ontario
You are probably right, a good synthetic 10w40 might just have less VII than a conventional 10w30 would have. But at the same time, that same brand of synthetic's 10w30 would then have less VII too.

I guess that's another good reason I'm getting away from the Maxlife. Although based on how well it held it's viscosity after 2300 miles of hard driving I would have to say it probably doesn't have too much VII.

In the original question though, he was referring to a conventional 10w40 though. That would most likely have quite a bit of VII.

It would be nice if there was some way that the technical specs on an oil would list the amount
of VII that they use.

[ July 26, 2002, 08:30 PM: Message edited by: Patman ]

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#3503 - 07/26/02 06:33 AM Re: 10/40 summer ?
satterfi Offline


Registered: 06/20/02
Posts: 903
Loc: CA
I guess it really doen't matter how much VII an oil has. If it can hold its' grade for the time it's in the engine then that's good enough.

[ July 26, 2002, 09:34 PM: Message edited by: satterfi ]

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#3504 - 07/26/02 09:52 AM Re: 10/40 summer ?
MolaKule Offline


Registered: 06/05/02
Posts: 14644
Loc: Midwest
"Does Redline or Amsoil 10w40 have more VII than Maxlife 10w30 or Shaefers 15w40? I don't know. I'd hope the best full syns in the 10w40 grades have less VIIs than a dino 10w30 or blend 15w40."

I am confident that Redline and or Amsoil 10W40 and for certain the 15W40 AME, has less VII's than does Maxlife 10W30. I attempted to look at the Schaeffer's spec sheet a moment ago, but their site is down for reconstruction, but as I recall, the Schaeffer's 15W40 blend has a good amount of PAO's in them, so the VII level would probably be lower than even for MAxlife 10W30.

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#3505 - 07/26/02 02:48 PM Re: 10/40 summer ?
Patman Offline



Registered: 05/27/02
Posts: 19287
Loc: Oakville, Ontario
Now I really am anxious to get this Maxlife out! [Smile]

But in the name of science, I will run it the full 6000km (3700mi) interval I intended, just
for a baseline before the switch to Schaeffers. I calculate I should reach this mileage
within a few days of Sept 15. [Smile]

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