I’ve always used 10w-30 royal purple synthetic oil when it was time to change the oil but my question is now that it’s winter should I increase the weight to like 10w-40 or....? Thank you
Oil weight question
- Thread starter WeaponX
- Start date
Sounds backwards to me.....lighter weight with colder temps, heavier weight in high heat. All within reason of course.
From the owners manual...
Mooseman
Moderator
The lower number is the viscosity when cold. You need a lower number for easier pumpability in sub zero temps. Once warm, it will lubricate like a 30 weight oil. You can never go wrong always using 5w30.
If you would to learn more about oil check out Bob is the Oil guy @ https://www.bobistheoilguy.com/
Oil is thermoplastic, it thins as it warms up (to a point, then cokes up). The number before the "w" is a number assigned for cold flow and pump ability. Certain ASTM tests are done at certain temperatures to give an oil the number. The lower the number the colder temp the oil has to pass the tests at.
At 100 celcius the oil has to fall within a certain bracket to be called a certain weight. Like 9 to 13 cSt to be a 30 weight. So you could have a thin 30 weight that is essentially identical to a thick 20 weight.
At 100 celcius the oil has to fall within a certain bracket to be called a certain weight. Like 9 to 13 cSt to be a 30 weight. So you could have a thin 30 weight that is essentially identical to a thick 20 weight.
This Video from IMSTRICKEN06 gives "chilly" visual proof of @TJBaker57, @Mooseman and @BrianF 's observations of the need for using the Lowest Viscosity Lower Number during Sub-Zero and DEEP Cold periods of Vehicle Operation:
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Mobile 1 makes a 0W-30 (available reasonably priced at Wal-Mart). I have an old Honda Civic that has a lot of valve train chatter in cold weather. Using the 0W-30 really quiets it down. I tried it in the Trailblazer one winter. Didn't seem to like it. It seemed louder than using Mobile 1 5W-30.
Wow I just learned a lot thanks guys!
I always use a K&N oil filter and Royal purple oil but never even knew u went lower for cold as I’ve never tried it before but will this year. Thanks again everyone cause I really did learn a lot
I always use a K&N oil filter and Royal purple oil but never even knew u went lower for cold as I’ve never tried it before but will this year. Thanks again everyone cause I really did learn a lot