Schaeffer's 5W-30 vs 10W-30

Al

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I usually don't start threads-but I have a delema. I recently put the 10W-30 blend in my Sentra here in Pa (even though winter is coming). We do get normally a vew days at zero and can get as low as -15F. I can live with the fact that I used the 10W but since I understand the 5W blend has more Group III. I wonder if I should go with it (5W) in the future??
 
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Bob, in your opinion do you believe that the 5W-30 is a better oil than the 10W-30 because of the difference in base stock? I ask this question because I too can use either 5W or 10W and naturally I'd rather buy the better product.
 
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quote:
Originally posted by sbc350gearhead: Patman said that the 5w30 is PAO and GIII.
Where's the Group III? "Supreme 7000 SAE 5W-30 is blended from the finest quality solvent refined, severely raffinate hydroconverted Group II Plus100% paraffin base oils and polyalphaolefin (PAO) synthetic base fluids available." http://www.schaefferoil.com/data/701.htm http://www.schaefferoil.com/msds/7015W30.html Ken [ September 20, 2003, 02:48 PM: Message edited by: Ken2 ]
 
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Quote patman "You have to give Schaeffer Oil credit for being honest though. Technically speaking their 5w30 "blend" could be called a full synthetic. It's got more synthetic materials in it than Syntec 5w30, Valvoline Synpower 5w30, etc. Those "synthetics" are almost entirely group 3 with possibly a tiny bit of esters, while Schaeffer's 5w30 blend has a nice 20-25% mix of PAO and the rest is group 3. (Their 10w30 blend uses the same amount of PAO but uses group 2+ in place of the group 3)" I have no idea, one way or the other. I have never used Schaeffers oil. I assumed patman knew the composition, from his post. [ September 20, 2003, 06:26 PM: Message edited by: sbc350gearhead ]
 

Patman

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Bob will confirm this, as he spoke to the head chemist at Schaeffer Oil and found out that the 5w30 blend is indeed comprised of group 3 and PAO, while the 10w30 blend is group 2+ and PAO. In my experiences with both of these oils, the 5w30 has a thicker viscosity at 100c. All of my 10w30 batches were around 10.1 to 10.3, while the UOA on the 5w30 showed 10.9 (granted this is just one UOA on one batch, so it may not be typical)
 
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Al said, "...I understand the 5W blend has more Group III...." No Schaeffer oil has any Group III base oil in it, an least none that I've seen and certainly not #701 nor #703. FowVay said, "Bob, in your opinion do you believe that the 5W-30 is a better oil than the 10W-30 because of the difference in base stock?" 5w-30 is not a better oil, it just better for cold weather. Ken
 
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Patman, I was wondering that and you answered it for me. Since Schaeffer's does not give you the exact viscosity of their oils I was wondering if their 10W-30 was thicker than their 5W-30 at operating temp. Maybe Bob has seen more #701 5W-30 reports?
 

Al

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This is odd: Spec sheet for 5W-30 Blend 5W-30 BlendCold Cranking Viscosity @-20°C, cP (ASTM D-5293)= 5,073 Spec sheet for 10W-30 Blend Cold Cranking Viscosity (ASTM D-5293) @-25°C, cP= 4,500 So the Schaeffer's 10W-30 is better than the 5W-30. Oh and the pour points are the same. Why would you buy the 5W-30 stuff?? [Duh!]
 

Patman

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quote:
Originally posted by Al: This is odd: Spec sheet for 5W-30 Blend 5W-30 BlendCold Cranking Viscosity @-20°C, cP (ASTM D-5293)= 5,073 Spec sheet for 10W-30 Blend Cold Cranking Viscosity (ASTM D-5293) @-25°C, cP= 4,500 So the Schaeffer's 10W-30 is better than the 5W-30. Oh and the pour points are the same. Why would you buy the 5W-30 stuff?? [Duh!]
Those numbers are incorrect though. I asked about that last year when I started using the 10w30 blend. The 5w30 has to have better cold cranking numbers than the 10w30, otherwise it wouldn't be a 5w oil. I'm surprised Schaeffer Oil still hasn't corrected the mistake in their data sheets after all this time. Perhaps Bob can get us the true data on these two oils.
 

Al

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Thanks-I think we have seen discrepancies before on Schaeffer's oil specs. Here are the specs on 15W-40: (#700 Blend) CCS Viscosity @ -25°C cP (ASTM D-5293) 4,877 Thats also better than the 5W-30 [Roll Eyes] Maybe they should remove all of the data sheets. [Frown] [ September 22, 2003, 09:08 PM: Message edited by: Al ]
 
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