Industry Strides Towards GF-6
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Originally Posted By: dparm
Why is 10w30 still around?
For some strange reason Dodge wants me to use 10w30 in my GC 4.0L V6. I really think that 0w30 or 5w30 is better, even here in FL.
Why is 10w30 still around?
For some strange reason Dodge wants me to use 10w30 in my GC 4.0L V6. I really think that 0w30 or 5w30 is better, even here in FL.
10w30 should have been obsolete 5 years ago and been killed off after the SM formulation. Poop
Because older cars benefit and even call for 10W-30. Anything new I'd use 0/5W-20/30 if recommended, but older engines with waning compression and increasing tolerances might benefit from an oil that doesn't shear down as easily.
A 1996 Toyota (4-cyl) still calls for it on the cap....
A 1996 Toyota (4-cyl) still calls for it on the cap....
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Originally Posted By: Nickdfresh
Because older cars benefit and even call for 10W-30. Anything new I'd use 0/5W-20/30 if recommended, but older engines with waning compression and increasing tolerances might benefit from an oil that doesn't shear down as easily.
A 1996 Toyota (4-cyl) still calls for it on the cap....
Viscosity spread isn't really an issue with shear resistance in modern oils.
Because older cars benefit and even call for 10W-30. Anything new I'd use 0/5W-20/30 if recommended, but older engines with waning compression and increasing tolerances might benefit from an oil that doesn't shear down as easily.
A 1996 Toyota (4-cyl) still calls for it on the cap....
Viscosity spread isn't really an issue with shear resistance in modern oils.
Originally Posted By: Nickdfresh
Because older cars benefit and even call for 10W-30. Anything new I'd use 0/5W-20/30 if recommended, but older engines with waning compression and increasing tolerances might benefit from an oil that doesn't shear down as easily.
A 1996 Toyota (4-cyl) still calls for it on the cap....
The technically obsolete 10W-30 is a dino grade that is formulated typically more heavily (higher HTHSV) in a mineral format vs a 5W-30. Whether it is any more shear stable today is questionable. In marketing terms it's simply a heavier oil not just on start-up but at operating temp's as well.
I only know of one company that still spec's the 10W-30 grade for a model or two and that's Chrysler and I'm sure that I'm sure won't be for long.
Regarding a 20 year old application. I'd be willing to bet that today's API 5W-30 dino is more shear resistant that a 10W-30 of 20 years ago.
Because older cars benefit and even call for 10W-30. Anything new I'd use 0/5W-20/30 if recommended, but older engines with waning compression and increasing tolerances might benefit from an oil that doesn't shear down as easily.
A 1996 Toyota (4-cyl) still calls for it on the cap....
The technically obsolete 10W-30 is a dino grade that is formulated typically more heavily (higher HTHSV) in a mineral format vs a 5W-30. Whether it is any more shear stable today is questionable. In marketing terms it's simply a heavier oil not just on start-up but at operating temp's as well.
I only know of one company that still spec's the 10W-30 grade for a model or two and that's Chrysler and I'm sure that I'm sure won't be for long.
Regarding a 20 year old application. I'd be willing to bet that today's API 5W-30 dino is more shear resistant that a 10W-30 of 20 years ago.
Originally Posted By: dparm
Originally Posted By: Nickdfresh
Because older cars benefit and even call for 10W-30. Anything new I'd use 0/5W-20/30 if recommended, but older engines with waning compression and increasing tolerances might benefit from an oil that doesn't shear down as easily.
A 1996 Toyota (4-cyl) still calls for it on the cap....
Viscosity spread isn't really an issue with shear resistance in modern oils.
Shear resistance? Might want to check out some more Subaru uoa's.
And you don't even have to look for the turbo uoa's to find shearing.
-Dennis
Originally Posted By: Nickdfresh
Because older cars benefit and even call for 10W-30. Anything new I'd use 0/5W-20/30 if recommended, but older engines with waning compression and increasing tolerances might benefit from an oil that doesn't shear down as easily.
A 1996 Toyota (4-cyl) still calls for it on the cap....
Viscosity spread isn't really an issue with shear resistance in modern oils.
Shear resistance? Might want to check out some more Subaru uoa's.
And you don't even have to look for the turbo uoa's to find shearing.
-Dennis
It's about acceptable shear resistance.
All OEMs allow 15-20% of oil shear before an oil is condemned.
And of course we're talking just about oil shear and not fuel dilution which is a separate issue.
All OEMs allow 15-20% of oil shear before an oil is condemned.
And of course we're talking just about oil shear and not fuel dilution which is a separate issue.
Im awaiting -5w30
The lubrication doesnt settle, it floats and then thickens into a liquid.
I call it Zero G Oil
aha
The lubrication doesnt settle, it floats and then thickens into a liquid.
I call it Zero G Oil
ahaOriginally Posted By: dparm
Originally Posted By: Nickdfresh
Because older cars benefit and even call for 10W-30. Anything new I'd use 0/5W-20/30 if recommended, but older engines with waning compression and increasing tolerances might benefit from an oil that doesn't shear down as easily.
A 1996 Toyota (4-cyl) still calls for it on the cap....
Viscosity spread isn't really an issue with shear resistance in modern oils.
Then run 5W-30 in your Audi...
Originally Posted By: Nickdfresh
Because older cars benefit and even call for 10W-30. Anything new I'd use 0/5W-20/30 if recommended, but older engines with waning compression and increasing tolerances might benefit from an oil that doesn't shear down as easily.
A 1996 Toyota (4-cyl) still calls for it on the cap....
Viscosity spread isn't really an issue with shear resistance in modern oils.
Then run 5W-30 in your Audi...
Originally Posted By: CATERHAM
Originally Posted By: Nickdfresh
Because older cars benefit and even call for 10W-30. Anything new I'd use 0/5W-20/30 if recommended, but older engines with waning compression and increasing tolerances might benefit from an oil that doesn't shear down as easily.
A 1996 Toyota (4-cyl) still calls for it on the cap....
The technically obsolete 10W-30 is a dino grade that is formulated typically more heavily (higher HTHSV) in a mineral format vs a 5W-30. Whether it is any more shear stable today is questionable. In marketing terms it's simply a heavier oil not just on start-up but at operating temp's as well.
I only know of one company that still spec's the 10W-30 grade for a model or two and that's Chrysler and I'm sure that I'm sure won't be for long.
Regarding a 20 year old application. I'd be willing to bet that today's API 5W-30 dino is more shear resistant that a 10W-30 of 20 years ago.
I don't totally disagree. But it should be noted that V6 3.0L in the same class of Camry called for 5W-30, so this isn't simply a case of a manufacturer recommending you do no use "5W-30 for extended highway operation" or whatnot. I do not doubt today's 5W-30's are more shear resistant, but they do still shear, and there is something to be said for thicker base oils in certain applications.
If I end up keeping this thing pending on what a family member wants to do, I'd use 5W-30 all winter (high mileage of course, since it tends to be leaky)...
Originally Posted By: Nickdfresh
Because older cars benefit and even call for 10W-30. Anything new I'd use 0/5W-20/30 if recommended, but older engines with waning compression and increasing tolerances might benefit from an oil that doesn't shear down as easily.
A 1996 Toyota (4-cyl) still calls for it on the cap....
The technically obsolete 10W-30 is a dino grade that is formulated typically more heavily (higher HTHSV) in a mineral format vs a 5W-30. Whether it is any more shear stable today is questionable. In marketing terms it's simply a heavier oil not just on start-up but at operating temp's as well.
I only know of one company that still spec's the 10W-30 grade for a model or two and that's Chrysler and I'm sure that I'm sure won't be for long.
Regarding a 20 year old application. I'd be willing to bet that today's API 5W-30 dino is more shear resistant that a 10W-30 of 20 years ago.
I don't totally disagree. But it should be noted that V6 3.0L in the same class of Camry called for 5W-30, so this isn't simply a case of a manufacturer recommending you do no use "5W-30 for extended highway operation" or whatnot. I do not doubt today's 5W-30's are more shear resistant, but they do still shear, and there is something to be said for thicker base oils in certain applications.
If I end up keeping this thing pending on what a family member wants to do, I'd use 5W-30 all winter (high mileage of course, since it tends to be leaky)...
Originally Posted By: modularv8
GF-6A Performance Comparison Tool - Spider Diagram
what is that low speed pre-ignition protection?
GF-6A Performance Comparison Tool - Spider Diagram
what is that low speed pre-ignition protection?
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