Highest Viscosity @ 100 Degrees C. 0W20 Oil ?

[ChrisD46]

Between M1 , Pennzoil , Quaker State and Valvoline - which 0W20 oil has the highest viscosity @ 100 degrees C. ?

 

[Oil Changer]

Why? If you think the 20-grade is too light, run a 30-grade. If you're worried about warranty issues (which is WAY overblown around here) M1 or EP will most likely be the heaviest of the 20's.

 

[yeti]

nobody is going to know this without looking up specs, so try looking up the data yourself. go to each co. website, and check the 0w-20 specs. easy. this way, you don't have to wait for a reply.have a good day.

 

[EdwardC]

Talking strictly 0W20, my records show that Valvoline Synpower has the highest viscosity at 100C, 8.9. That's taken from some data sheet, it may not be their actual spec, but is what they publish. My table has M1 AFE at 8.7 and M1 EP at 8.6. PP and QSUD are lower at 8.3 and 8.39 respectively. But, like Oil Changer says, who cares. If you want a slightly thicker 0W20, make your own blend of one quart 0W30 and the rest 0W20 of your choice. Sorry for the ugly table, too lazy to fix the spacing. I don't know the accuracy of the data, it was just pulled off manufacturer's sites.

Code:

Brand	Weight	40C	100C
MAG 1	0W20	42.31	8.06
Mazda Genuine Motor Oil	0W20	35	8.3
Amsoil XL	0W20	44.2	8.3
Amsoil OE	0W20	44.2	8.3
Pennzoil Platinum	0W20	45.3	8.3
Honda Genuine Motor Oil	0W20	38.87	8.301
Royal Purple	0W20	42.58	8.37
ENEOS	0W20	42.41	8.38
Quaker State Ultimate Durability	0W20	42.6	8.39
Pennzoil Ultra	5W20	47.43	8.4
Toyota Genuine Motor Oil	0W20	36.1	8.5
Castrol EDGE EP	0W20	44.22	8.5
Valvoline Durablend	5W20	45.78	8.5
Pennzoil Platinum	5W20	45.34	8.56
Mobil 1 EP	0W20	44.9	8.6
Mobil 1 Super Synthetic	0W20	44.9	8.6
Valvoline MaxLife High Mileage 	0W20	45.5	8.6
Valvoline Durablend	0W20	45.6	8.6
Castrol EDGE	0W20	49.35	8.668
Quaker State Ultimate Durability	5W20	46.51	8.68
Mobil 1 AFE	0W20	44.8	8.7
Valvoline Synpower	5W20	48.1	8.7
Valvoline NextGen MaxLife	5W20	51	8.7
Kendall GT-1 w/ Titanium	0W20	46	8.8
Amsoil Signature	0W20	46.7	8.8
Valvoline Synpower	0W20	47	8.8
Valvoline MaxLife High Mileage 	5W20	51.3	8.8
Quaker State Enhanced Durability HM	5W20	51.6	8.8
Castrol GTX SynBlend	0W20	47.64	8.9
Castrol GTX Magnatec	0W20	47.64	8.9
Mobil 1 EP	5W20	49.6	8.9
Mobil 1	5W20	49.8	8.9

 

[Finz]

According to their own websites: Pennzoil Ultra P 8.8 cSt at 100 c M1: 8.7 PP is 8.3 Valvoline SynPower: 8.8 I couldn't get any info on QS My question is: Is there any Real-world difference between PP at 8.3 and M1 at 8.7? For a long highway drive... Say NY Thruway with hills, luggage, traffic,.... Would the car rather the 8.7 or is the 8.3 essentially the same?

 

[spasm3]

You could mix 3 quarts of 20wt with a quart of 30 to achieve a bit more viscosity. I would do this within the same brand.

 

[Rand]

Originally Posted By: spasm3

You could mix 3 quarts of 20wt with a quart of 30 to achieve a bit more viscosity. I would do this within the same brand.

right the idea here is to keep the same additive pack.. so 3qt m1 0w20 1qt m1 0w30.. etc. both AFE, EP etc a long highway run wont mean anything.. if anything you have better cooling then. now if you said towing up a long grade or auto-x that might be slightly more important.

 

[Finz]

So at what point do you draw the line? Your 3 qts 0w-20 and 1 qt 0w-30 produces a cSt of 9.2 using widman calculator What I'm trying to figure out is how do you determine what value is too low or too high for any given vehicle? My Accord calls for a 5w-20 but is back spec'd to 0w-20. M1 cSt is 8.9 and 8.7 respectively I imagine a lot of the specs depends upon the passages thru which the oil flows...? Curious to determine how much fluctuation is allowed without doing damage. If I threw a 10w-40 in there (I wouldn't), what would happen? What if I brewed a mix that developed a 10.5 cSt or 12+ vs the spec'd 8.x I don't have an oil pressure guage so I wouldn't be able to monitor... Aside from this, just use common sense? Would love to know what tolerances might exist for cSt deviation

 

[CATERHAM]

Your asking the wrong question and while it's common with newbies many motor oil academics make the same error. Presumably you want to know what is the heaviest 0W-20 is at operating temp's and the KV100 spec' won't accurately tell you that since it varies with type of base oil and polymer content. A more accurate indicator of how heavy an oil will be is the HTHS viscosity spec' and while it's measured at 150C it's influence applies at temp's well below 100C modified by an oil's viscosity index. The other incorrectly implied assumption alluded by your question is that your engine could benefit from a somewhat heavier oil. If a 20 grade is what is recommended for the car the lowest HTHSV of 2.6cP is what is specified. Running a 20 grade with a higher HTHSV rating will provide you with a higher viscosity reserve but that reserve is already pretty substantial on the specified lighter oil. If you want to get an idea of how much viscosity reserve you have get your oil pressure tested (its very simply test) when the oil is fully hot. In all likelihood you'll be well above the factory test spec' even on the lightest most shear prone 20 grade you can find. The conclusion being that their is no point running anything heavier.

 

[CATERHAM]

Of the four 0W-20 brands you've enquired about M1 AFE will possibly be the heaviest at hot operating Temp's be clause it has the highest published HTHSV of 2.7cP but it also has a slightly higher VI. Then again it is also possibly more shear prone than the SOPUS brands. At the end of the day the only way to know for sure would be to test the oils in a car with both oil temp and oil pressure gauges. An educated guess would be that there is very little difference in operational viscosity between these 0W-20 oils and that applies to most OTC 0W-20s.

 

[DrAdmin]

I rather look at additive packages; where Pennzoil have highest molybdenum (if I not mistaken)

 

[CATERHAM]

Originally Posted By: DrAdmin

I rather look at additive packages; where Pennzoil have highest molybdenum (if I not mistaken)

In addition other AW additive levels but they are all within a narrow range. But I agree it's an often over looked factor that I always consider.

 

[Scout1]

Originally Posted By: EdwardC

Talking strictly 0W20, my records show that Valvoline Synpower has the highest viscosity at 100C, 8.9. That's taken from some data sheet, it may not be their actual spec, but is what they publish. My table has M1 AFE at 8.7 and M1 EP at 8.6. PP and QSUD are lower at 8.3 and 8.39 respectively. But, like Oil Changer says, who cares. If you want a slightly thicker 0W20, make your own blend of one quart 0W30 and the rest 0W20 of your choice. Sorry for the ugly table, too lazy to fix the spacing. I don't know the accuracy of the data, it was just pulled off manufacturer's sites.

Code:

Brand	Weight	40C	100C
MAG 1	0W20	42.31	8.06
Mazda Genuine Motor Oil	0W20	35	8.3
Amsoil XL	0W20	44.2	8.3
Amsoil OE	0W20	44.2	8.3
Pennzoil Platinum	0W20	45.3	8.3
Honda Genuine Motor Oil	0W20	38.87	8.301
Royal Purple	0W20	42.58	8.37
ENEOS	0W20	42.41	8.38
Quaker State Ultimate Durability	0W20	42.6	8.39
Pennzoil Ultra	5W20	47.43	8.4
Toyota Genuine Motor Oil	0W20	36.1	8.5
Castrol EDGE EP	0W20	44.22	8.5
Valvoline Durablend	5W20	45.78	8.5
Pennzoil Platinum	5W20	45.34	8.56
Mobil 1 EP	0W20	44.9	8.6
Mobil 1 Super Synthetic	0W20	44.9	8.6
Valvoline MaxLife High Mileage 	0W20	45.5	8.6
Valvoline Durablend	0W20	45.6	8.6
Castrol EDGE	0W20	49.35	8.668
Quaker State Ultimate Durability	5W20	46.51	8.68
Mobil 1 AFE	0W20	44.8	8.7
Valvoline Synpower	5W20	48.1	8.7
Valvoline NextGen MaxLife	5W20	51	8.7
Kendall GT-1 w/ Titanium	0W20	46	8.8
Amsoil Signature	0W20	46.7	8.8
Valvoline Synpower	0W20	47	8.8
Valvoline MaxLife High Mileage 	5W20	51.3	8.8
Quaker State Enhanced Durability HM	5W20	51.6	8.8
Castrol GTX SynBlend	0W20	47.64	8.9
Castrol GTX Magnatec	0W20	47.64	8.9
Mobil 1 EP	5W20	49.6	8.9
Mobil 1	5W20	49.8	8.9

Interesting data. I took it into Excel and did some sorting. The cream rises to the top! Interesting the three oils that start out the thinnest when cold and have the lowest ratio between hot and cold are, in order, Mazda, Toyota and Honda. Toyota being the best in terms of holding a slightly thicker hot viscosity which is probably why folks rave about the TGMO.

 

[Quattro Pete]

Originally Posted By: ChrisD46

Between M1 , Pennzoil , Quaker State and Valvoline - which 0W20 oil has the highest viscosity @ 100 degrees C. ?

What is the underlying problem you're trying to solve?

 

[Ram01]

Which 0w20 would protect the best ??? Is it the light sopus products or the heavier meatier M1 brand ??? VSP we'll they'll be fine

 

[ChrisD46]

Thanks for the replies ...My Hyundai / Kia engines state 5W20 on the oil fill cap and owners manual states 5W30 and 10W30 acceptable . * Due to family members driving habits ( horrible at letting an engine warm up before racing off) I am looking for more start up engine wear protection by using a 0W20 ~ 0W30 oil . Many have stated M1 AFE 0W oils are just plain good (SOPUS 0W oils are too I'm sure)so I wanted to consider using a 0W oil year round for best start up wear protection .

 

[Quattro Pete]

Originally Posted By: ChrisD46

so I wanted to consider using a 0W oil year round for best start up wear protection .

If you're interested in startup wear protection, then why are you asking about viscosity at 100C?

 

[CATERHAM]

Originally Posted By: Quattro Pete

Originally Posted By: ChrisD46

so I wanted to consider using a 0W oil year round for best start up wear protection .

If you're interested in startup wear protection, then why are you asking about viscosity at 100C?

It's a fear based question that I would say most newbies to motor oil have. The ingrained assumption is that 0W oils offer less high temp protection than 5W and heavier oils. And also that 0W oils automatically have better start-up "protection" vs a a 5W oil; i.e., a 0W-30 is lighter than a 5W-20 at all startup temp's. Neither of which are true. Since we now know more details of the application a more precise answer to his question is that of the four oils in question they much the same but you should rather consider an oil like TGMO or MGMO 0W-20 since they are the lightest on startup and during warmup. The reason being their much higher VIs and lower KV100 spec's plus high AW additive levels.

 

[Yah-Tah-Hey]

If they are "racing off", you have more problems than just engine wear at start up.

 

[CATERHAM]

Originally Posted By: HosteenJorje

If they are "racing off", you have more problems than just engine wear at start up.

I get the OP's point if you haven't. Zero concern with a gradual warmup procedure particularly at subfreezing temp's is not uncommon. And it is true, an engine will warm up faster the harder you work it. I'd say most drivers are just concerned with getting some heat out of the engine and into the car interior ASAP although that's not best if your want a long engine life. Running the lightest 0W-20 on startup will at least mitigate the problem.