GC 0w-30 and hot California temps?

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Its my first run with the GC and almost time to change it. [Cheers!] (GC 383 stroker UOA) Though with warmer weather in the near future the 0w is kinda bothering me. Should I have any reason to worry about the 0w in warm weather? More wear on cold starts? Its pretty darn hot in Bakersfield and even in the winter temps only get down in the 40's. The only temp issues brought up with GC have been cold starts etc. How will the 0w effect me???? [Confused] BTW, truck is driven on mostly short trips around town. Not alot of highway driving. [ January 25, 2004, 03:16 PM: Message edited by: Silverado ]
 
If it is working fine for you now, then there will be no problem using it all year (hot or cold). 0W30 oils have been out for a while and they will work all year round, from Texas to Minnesota. So if you have had a good run now then the summer should be okay also. And from what I have read here the GC 0W30 is formulated on the thicker side. Good Day, Steven
 
Not to worry [Big Grin] This oil is actually thicker and has a higher HT/HS than virtually all 10W-30's at operating temps. It ok. [Razz]
 
No worries. At 100C (212F) the GC is still a exellent 30 weight. How can 0W be 'bad' for a cold start??? When it's 100F outside and the engine hasn't been run since yesterday, it's still a cold start for the engine. Normal operating temp is 180F to 212F. Don't get hung up on the 0W. It's a good thing, not a bad thing. DEWFPO
 
I am worried because the 0w when cold could result in more wear at startup. I know it is a thick 30 wt, thats why I chose to run it. Its just that if I dont have to worry about cold temp starts AT ALL.....is this oil really right for my application?
 
quote:
Originally posted by Silverado: I am worried because the 0w when cold could result in more wear at startup. I know it is a thick 30 wt, thats why I chose to run it. Its just that if I dont have to worry about cold temp starts AT ALL.....is this oil really right for my application?
Well that's not a problem-at 210 F the oil is around 10 cSt (probably about 11)). At any temp below that the oil is thicker than 10 cSt. For instance at about 40 F 0W is around 52 cSt, 5W is around 54 cSt. and 10W is around 60 cSt. So you see 0W is better - more flow yet much thicker than 30 wt at 210 F. The problem with the 0W is the higher viscosity spread which means more shearing down. If you are concerned about the heat the 40 wt. could (and I say-could) be a better choice than the 30 wt.
 
Chris One Forty Two, Next time you come off the mountain try the AZ on Foothill and Rochester in Rancho Cucamonga. It's in the same center as Home Depot. Last time I was there they had some and I only bought a few. Happy hunting!
 
quote:
Originally posted by BIGJ552000: Is there really alot of shearing from this oil? [I dont know]
No this oil appears to be pretty shear stable according to the last half dozen Used oil analysis we have seen here. So ignore my previous comment [Embarrassed] But I was really talking in general terms-greater spread usually means less shear stable. This oil hangs in there. [Smile]
 
Is a heavier viscosity really necessary during the hot summer months? I'm starting to think not if the the thinner grade is shear stable.More heat dispersion through the oil also.I thinking of trying Motorcraft 5W20 in my Corolla that calls for 5W30.
 
quote:
Originally posted by Alan: Is a heavier viscosity really necessary during the hot summer months? I'm starting to think not if the the thinner grade is shear stable.More heat dispersion through the oil also.I thinking of trying Motorcraft 5W20 in my Corolla that calls for 5W30.
If you're going to try any of the 20wt oils out there, I'd say to give Mobil 1 0w20 a try. It's proving itself to be one heck of a consistent oil.
 
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