Questions regarding GC in a 4x4 that calls for 10w-30

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Ontario, Canada
Hello:

Local supplier here has GC for an excellent price and im coming up on a oil change soon. The -38 C temps have passed for now and although we may dip that low again this year I believe the coldest has passed. My questions or concerns with this oil is that is it a wise choice to be used in a 4x4 truck calling for a 10W-30 oil for summer time temps? I was hoping if I had good results with this oil that I may be able to use it year round? If I understand correctly the OW part is just the cold start flow ability correct? What will happen with this oil in higher temps? I really dont work the truck that hard but it does get hot here in the summer and cold in the winter from -40 C to +33 C. Basically what I want to know is this oil a good candidate for year round use for my application. Some light trailering (travel trailer and jet ski etc) I am just concerned that this oil is not what my owner's manual calls for. Anyone willing to share their thoughts or experiences with this oil, it would be greatly appreciated
yr 2000 5.2 L Magnum Engine
47,000 Km on this motor
Thanks everyone! looking forward to the responses and cant wait to switch to synthetic.
 
Don't worry! As Patman and others have pointed out so often, GC is a heavy 30 weight oil. It is 12.2 cst@100*C. In fact, it is almost a 40 wt oil. You can run this oil year round.
 
No problem GC has a higher viscosity at 100C (operating temperatures) than some other oils (Mobil 1 for example). The 0W defines an oil at -35C. And don't forget one important fact...0W-30, 5W-30, and 10W-30 oils are all thicker than when you run your car at operating temperature. This is always a misunderstood concept.
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Viscosity
 
Most of my gas engine customers down here in Alabama run the Series 2000, 0w-30 synthetic year round, and have been doing so for the past eight years with excellent results. I'd even recommend a 0w-30 synthetic in place of a 10w-40 petroleum oil in some applications.

The shear stable,very fuel efficient, 0w-30 and even 0w-20 grades are the wave of the future. Their popularity is only limited by the fact that they require expensive PAO basestocks ....Once longer drain intervals arrive, I think that 0w-20/0w-30 will be come the standard grades in the US. At the rate we are going, that may take 10-15 years to happen, however.

Tooslick
Dixie Synthetics
 
quote:

Originally posted by TooSlick:
Most of my gas engine customers down here in Alabama run the Series 2000, 0w-30 synthetic year round, and have been doing so for the past eight years with excellent results. I'd even recommend a 0w-30 synthetic in place of a 10w-40 petroleum oil in some applications.

The shear stable,very fuel efficient, 0w-30 and even 0w-20 grades are the wave of the future. Their popularity is only limited by the fact that they require expensive PAO basestocks ....Once longer drain intervals arrive, I think that 0w-20/0w-30 will be come the standard grades in the US. At the rate we are going, that may take 10-15 years to happen, however.

Tooslick
Dixie Synthetics


True, but the public will never have knowledge. They rely on the manufacturer's recommendation. At $1 a quart for good dino, the big companies are giving it away. They have to have something to do with this by-product.

It is hard for me to believe that any car or light truck needs anything but a 0W-30. 5-40 for heavy duty apps. That would make it too easy for consumers.
 
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