Lowest temp for SN rated SAE 30 conventional
- Thread starter ChemLabNL
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Put some in your freezer and then try pour it out. It will look like toufee.
I say to freezing or below, maybe 20 degrees, depending on brand and specs of the oil.
Several straight 30 weights will show the same specs as a 15w30, and are not or cannot be labelled that way because of testing or regulations.
Several straight 30 weights will show the same specs as a 15w30, and are not or cannot be labelled that way because of testing or regulations.
Or tofu?
Triple_Se7en
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Originally Posted by ChemLabNL
Lowest temp for SN rated SAE 30 conventional.....What say you?
SN 30W...... hmmm.
It's been 3-4 decades since I bought a quart of straight 30W.
Lowest temp for SN rated SAE 30 conventional.....What say you?
SN 30W...... hmmm.
It's been 3-4 decades since I bought a quart of straight 30W.
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Well, I don't know about in cars, but OPE engines like Briggs always said to use 30 w no lower temp than 32 degrees F. And of course those are splash lubed.
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My push lawnmowers went from straight 30W in the 70s - to 15W40 in the 80s -- then 5W40 synthetic around 2000 and still currently, even though my new 21" came with 10w30.
Originally Posted by SubieRubyRoo
Or tofu?
OK, poor spelling aside, let's use Tofu!
Or tofu?
Originally Posted by Wizz
Straight 30. The trend is towards tighter spread heavier oils. At the race track almost everyone runs 20w-50 in rather cold temps.
In Florida? Cold there is below 50F/10C! When I used SAE 30, my cutoff was about 20F/-7C, any lower & it was oil pan heater time.
Straight 30. The trend is towards tighter spread heavier oils. At the race track almost everyone runs 20w-50 in rather cold temps.
In Florida? Cold there is below 50F/10C! When I used SAE 30, my cutoff was about 20F/-7C, any lower & it was oil pan heater time.
Briggs & Stratton will say don't go below +40F with straight 30, but you have to remember those engines are splash lubed by a little dipper on the connecting rod cap.
Originally Posted by addyguy
I wouldn't use SAE 30 below -5C regularly. If you pushed it, I'm sure it 'would work' down to about -10C.
As said, modern SAE 30's are at least '20W-30', even though that doesn't exist.
The API lists a single 20W-30 on its EOLCS list. A company in Dubai.
Quote
https://engineoil.api.org/Directory/EolcsResultsDetail?accountId=-1&companyId=10575
TESLA POLARIS 1120 20W-30 SN
I wouldn't use SAE 30 below -5C regularly. If you pushed it, I'm sure it 'would work' down to about -10C.
As said, modern SAE 30's are at least '20W-30', even though that doesn't exist.
The API lists a single 20W-30 on its EOLCS list. A company in Dubai.
Quote
https://engineoil.api.org/Directory/EolcsResultsDetail?accountId=-1&companyId=10575
TESLA POLARIS 1120 20W-30 SN
I have some 30wt. Waiting for summer before i put it in my Jeep.
OVERKILL
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Originally Posted by addyguy
I wouldn't use SAE 30 below -5C regularly. If you pushed it, I'm sure it 'would work' down to about -10C.
As said, modern SAE 30's are at least '20W-30', even though that doesn't exist.
I'm sure it exists. Any Winter rating can exist alongside any SAE rating, even if they aren't remotely common in practice. Of course some wouldn't make sense, like you wouldn't have a 20w-12 or 20w-16, but a 20w-20 was a reasonably common grade "back in the day".
I wouldn't use SAE 30 below -5C regularly. If you pushed it, I'm sure it 'would work' down to about -10C.
As said, modern SAE 30's are at least '20W-30', even though that doesn't exist.
I'm sure it exists. Any Winter rating can exist alongside any SAE rating, even if they aren't remotely common in practice. Of course some wouldn't make sense, like you wouldn't have a 20w-12 or 20w-16, but a 20w-20 was a reasonably common grade "back in the day".
I depends on which straight 30 grade oil you are using.
Amsoil's qualifies as a 10w-30. Some dino versions I wouldn't use below 20°F.
What are you planning to use?
Amsoil's qualifies as a 10w-30. Some dino versions I wouldn't use below 20°F.
What are you planning to use?
OVERKILL
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Originally Posted by beanoil
I say to freezing or below, maybe 20 degrees, depending on brand and specs of the oil.
Several straight 30 weights will show the same specs as a 15w30, and are not or cannot be labelled that way because of testing or regulations.
I'm sure they could be labelled that way, I can't see any regulation that would prevent it. An oil without VII can be labelled as either a straight SAE grade or a multigrade if tested. AMSOIL's 10w-30 without VII is labelled as both.
I say to freezing or below, maybe 20 degrees, depending on brand and specs of the oil.
Several straight 30 weights will show the same specs as a 15w30, and are not or cannot be labelled that way because of testing or regulations.
I'm sure they could be labelled that way, I can't see any regulation that would prevent it. An oil without VII can be labelled as either a straight SAE grade or a multigrade if tested. AMSOIL's 10w-30 without VII is labelled as both.
20w50 conventional is good to 10F 30 probably to 32'F. To anyone using 5w30 in their lawnmower. Grass doesnt grow below 40 F
About 30 years ago, I had to pull someone out of a snowbank in North Dakota.
It was about -40*F ... my 1951 Farmall "M" had 30W Cenex oil in the crankcase.
It actually started fine (surprised, since it was filled with "summer gas")
It took about 15 seconds to get oil pressure - but it did.
It was about -40*F ... my 1951 Farmall "M" had 30W Cenex oil in the crankcase.
It actually started fine (surprised, since it was filled with "summer gas")
It took about 15 seconds to get oil pressure - but it did.
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