Different weight for winter and summer?

[ekincam]

I have a Toyota Camry 2.2L 4 cylinder. Previously, I ran 5w30, usually Castrol GTX, all year changing it out at 3000-4000 miles. I did this at my old home where the temperature varied from 45 deg F to 80 deg F throughout the year.

Now I live where the temperature varies from 30 deg F to 130 deg F throughout the year. Currently, the temperature varies from 85 deg F in the morning before dawn to 120 deg F during the middle of the day. During the winter, it will be 30 deg F in the morning and 50 deg F during the day.

Is there any reason I should use different weight oil throughout the year? Someone suggested taht I do so. Toyota recommends 5w30 and 10w30 oil. I changed from Castrol GTX 5w30 to Mobil 1 Clean 7500 10w30 today and did not notice much difference in the way the car warmed up.

 

[Ugly3]

With 3,000 to 4,000 mile OCIs most any quality 5w30 conventional would serve you well.

 

[TallPaul]

With your climate I would run a 10w30 year round.

 

[ekincam]

Will different weight oils be more useful in different temperatures?

By switching to Mobil 1 Clean 7500, I want to change the OCI to about 5,000 miles or more. I think it is a semi-synthetic or synthetic blend oil. Will it be safe to do so?

 

[Swift]

quote:

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Originally posted by TallPaul:
With your climate I would run a 10w30 year round.

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Agree

 

[Drew99GT]

Theoretically a 10w30 will be more stable under extreme heat That's what I'd use all year! My Toyota manual cuts 5w30 off at 60 degrees F. Cripes, where do you live; right smack dab in death valley??? What's your driving regimine? Mobil 7500 at 5,000 mile drains in 10w30 would be a great combo.

 

[Blue99]

quote:

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Will different weight oils be more useful in different temperatures?

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Yes, to me the benefits of a 5w30 oil take effect when ambient temperatures are 50 degrees and lower.

5w30's are blended for cold temp starts and will generate slightly better fuel economy during the approx 10 minutes required for the engine to get up to full operating temps.

Obviously this example is at the other end of the spectrum - cold start & warm-up are not issues.

A 10w30, with a greater percentage of higher viscosity base oils will be a benefit in 100F+ temps, as it has better performance in the areas of volatility & oxidation.

 

[1sttruck]

My 93 Taurus is supposed to use 5W30 or 10W30 per the Ford service manual. It's interesting though that in various sections when using a 'regular' oil to lube something they typically say to use 10W40, which I guess is what was originally intended, or perhaps previously used.

 

[JohnBrowning]

I would consider a 10W40 like CHevron Supreme or Havoline for year round use.You might also try Delo 15W40. If you wanted a synthetic then 5W40 like Mobil 1 Truck and SUV would be my pick.If you can find it localy Delo 10W30 would also make a good year round oil! In the environment you are in you can basicly use almost any viscosity you want!! 30°F is not even cold!

 

[DR Racing]

130 F holy cow where in so cal do you live death valley. I would run 10w30 winter and straight 40 in the summer if that summer temp is correct. Dan

 

[ekincam]

I live in the Marine Corps base in 29 Palms. It is about 100 mi south of Death Valley. I've only experienced 124 F myself last summer. But I've been told it can get up to 130 F.

 

[Slick17601]

Mobil 1 10w30 would be a good solution.

 

[Jonny Z]

Once the engine warms up, does the oil temperature differ that much beteen 70-degree or 130-degree days? The coolant gauge sure doesn't show a difference.

 

[Pablo]

Use a good synthetic 5W-40 and stop worrying. Seriously this is one of the best strengths of a synthetic base oil. You could use a synthetic 15w40...I do and it gets a lot colder here!

 

[2004 F150 4x4]

I will 2nd the Mobil 1 10w30 comment....
If you don't want to pay for a synthetic then yes Delo 15w40 would be fine. I would feel safe running either of these oils to a 5K OCI.
Good Luck.
Dave
(dang that is hot!!!)

 

[Audi Junkie]

15w-40

 

[mdocod]

you are never seeing extreme colds in your climate- you could easily run 15W40 year round and never have a pumpability problem. and the heavier oil will provide better protection in your extreme heat.

I'm planning to use 15W40 delvac in my vehicle year round, we see a few occassions around 0F here. Delvac remains pumpable down to below -20.