10/40 summer ?

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30
Location
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
 

MolaKule

Staff member
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Iowegia - USA
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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903
Location
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.
 

Patman

Staff member
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21,988
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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 ]
 
Messages
903
Location
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 ]
 

MolaKule

Staff member
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21,584
Location
Iowegia - USA
"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.
 

Patman

Staff member
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21,988
Location
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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