Even in winter time? It's for a 6 year old Sienna with over 100k miles. About to do Auto-RX.
Is it okay to use 10W30 instead of 5W30 in Southern California?
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No problems, go fot it !!!!
Yes.
And that's just Southern California.
Kestas
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Less viscosity modifier in the formulation. These modifiers are less stable and break down quicker than the base oil.
Patman
Staff member
This is true with dino 10w30 vs dino 5w30.
But with synthetic 5w30 vs synthetic 10w30, it's different. I'm pretty sure most 5w30 synthetics are created with no VII in them now.
10w30 is fine for SoCal all year long.
I'm confused. I've seen a couple threads now where people are worried about 5w30 shearing but it seems that most UOAs show that 5w30s hold up fine unless you do an extended OCI with dino. Why not stick with 5w30 for better start-up flow? Better yet, go with synthetic and change half as often. Am I mistaken about the shearing?
A good 5W-30 shouldn't be a problem, but a 10W-30 will work.
The differences in modern synthetic 5W-30 and 10W-30 are pretty small.
The differences in modern synthetic 5W-30 and 10W-30 are pretty small.
Well the definitions of 5W and 10W really come into play with Cold cranking and cold pumping at 25-35F below zero. But in some cases the biggest difference between Mobil 1 5W and 10W is in the color of the bottle.quote:
Originally posted by Blue99:
I'm really starting to enjoy these 5W-30 vs.10W-30 threads.
IMHO, many of today's 10W-30's have "morphed" into 5W-30's and the only real difference is the label on the bottle.
As a quiz for the oil junkies out there, pick the 10W's & 5W's viscosities out of this list of product data from 4 dino oils:
And Motorbike, give the other's a chance before you post!
Viscosity
Heck yes!
Hahahahaha..true
Element: I'd defer to your owner's manual. But this link confirms MikeP's comment -- in general, 10w-30 is good down to 0 degrees F.
http://www.chevron.com/prodserv/nafl/auto/content/faq.shtm
That's a general safe working range of sorts. In fact, Pennzoil 10w-30 (and presumably other conventional oils as well), per Pennzoil's spec sheet, has a Borderline Pumpling Temp of -26F. This means technically it should flow sufficiently down to that temp, at least when new (BPTs and Pour Points steadily degrade over time), although a lighter weight would certainly be more appropriate for such temps. But unless you go to the mountains occasionally in Winter (good point by tpi, as I occasionally ski in those mountains north of L.A.), 10w-30 is perfectly fine for So Cal year-round. Also keep in mind that some manuals, such as for my 2002 Chrysler, limit 5w-30 to a high temp of 100F, so 10w-30 should be your preferred year-round lube living where you do. But once again, I'd defer to your Honda manual.
http://www.chevron.com/prodserv/nafl/auto/content/faq.shtm
That's a general safe working range of sorts. In fact, Pennzoil 10w-30 (and presumably other conventional oils as well), per Pennzoil's spec sheet, has a Borderline Pumpling Temp of -26F. This means technically it should flow sufficiently down to that temp, at least when new (BPTs and Pour Points steadily degrade over time), although a lighter weight would certainly be more appropriate for such temps. But unless you go to the mountains occasionally in Winter (good point by tpi, as I occasionally ski in those mountains north of L.A.), 10w-30 is perfectly fine for So Cal year-round. Also keep in mind that some manuals, such as for my 2002 Chrysler, limit 5w-30 to a high temp of 100F, so 10w-30 should be your preferred year-round lube living where you do. But once again, I'd defer to your Honda manual.
I'm really starting to enjoy these 5W-30 vs.10W-30 threads.
IMHO, many of today's 10W-30's have "morphed" into 5W-30's and the only real difference is the label on the bottle.
As a quiz for the oil junkies out there, pick the 10W's & 5W's viscosities out of this list of product data from 4 dino oils:
IMHO, many of today's 10W-30's have "morphed" into 5W-30's and the only real difference is the label on the bottle.
As a quiz for the oil junkies out there, pick the 10W's & 5W's viscosities out of this list of product data from 4 dino oils:
And Motorbike, give the other's a chance before you post!
Here are the oils per the above viscosity data:
1. Citgo SuperGard 10W-30
2. Pennzoil 10W-30
3. TropArtic 5W-30 (GF-3 version)
4. Motorcraft 5W-30
Note: Motorcraft 5W-30 is a heavier viscosity at normal operating temperature than the 10W-30's
My original point is so many dino 5W-30's & 10W-30's are so close in viscosity, that only a UOA to measure the sheared viscosity at the end of OCI, or running the oil right down to the SAE J300 chart, cold temp grade limits, would illustrate any differences in viscosity.
Too often, 5W-30 is commonly viewed as being a "thinner oil" than 10W-30 and this is not the case when looking at the spec's for individual brands of oil.
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