*For popular M1 , Pennzoil , Valvoline , Castrol and Quaker State 5W30 synthetic oils - is there a HTHS list available ? ... I am guessing they all will have an HTHS of between 3.0 and 3.5 (with 3.5 being preferred ) . Second option would be which popular WM bought 5W30 synthetic oils have an HTHS closer to 3.5 than 3.0 ?
Synthetic 5W30 HTHS Comparisons ?
- Thread starter ChrisD46
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HTFSV: High-temperature, full-shear viscosity
It is theorized that the wear for the following engine components depends on these variables among other things: Bearings: high-temperature, high-shear (HTHS) viscosity, TBN/TAN/base-oil oxidation performance (lead and copper corrosion) Piston rings: base-oil viscosity, TBN/TAN/base-oil...
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HTHS is in the table.
Out of all of those, Valvoline has the highest at 3.2 HTHS.
You want 3.5 HTHS, you would most likely go with an European spec oil.
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Thanks for re posting. Great info in 1 post.
You really need and want a 10W30. QSFS. Robust. Just changed it out on the Ecosport below with the Ford /Mazda 2.0 NA motor.. It looked "normal"
Got a sample from that fuel diluter. should have results posted by end of the month.
do not fear the 10W
Got a sample from that fuel diluter. should have results posted by end of the month.
do not fear the 10W
Thanks for the information - a lot of folks really impressed with the new SP rated QSFS 5W30 / 10W30 for wear protection ... Even self-proclaimed oil Professor RAT 540 put the new QSFS 5W30 at the top of his list of oils providing the best wear protection . My lovely 2017 Hyundai Theta II 2.4L GDI engine has a known , poor bearing issue but is still under warrantee with the OM showing only 5W20 , 5W30 and 10W30 oil grades being permitted . I'd prefer not having to deal with Hyundai - even though I had the knock sensor software update and am supposedly protected for life . *Bearing wear protection is my chief #1 objective , so whatever the best I can get in a 10W30 / 5W30 with lower VII's piques my interest most (low OCI's address cleanliness and the rest of the oil ad pack I have less interest in ) .
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What about 5w30 oil <3.5 with a decent hths that are RC. There are at least a couple of shelf oils out there with 3.3, 3.4 that are still RC.
Royal Purple HMX 5w30 3.3
Which ones?
Note that ILSAC GF-X(A) XW-30 oils (Resource Conserving XW-30 oils) will have HTHS = 3.0–3.2 cP to be able to pass the ILSAC fuel-efficiency test (2.9 cP is also allowed). In addition to looking at the HTFS, ensure that you have a high HTFS. For an ideal monograde (straight grade, nonmultigrade), HTFS = HTHS. The more the VII content, the more HTFS will deviate from HTHS due to the temporary shear of the VII.
Link to Google sheet: Estimated base-oil viscosity (HTFS) and VII content of selected oils
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Amsoil OE and XL definitely are 3.3 but of course they aren't really readily available shelf oils. The others I was thinking about have changed formulations except for Valvoline Daily Protection 3.3 also.
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I've noticed specs can change somewhat dramatically for oils. I looked and sorry if I missed it, but do you keep track of when this data was updated?
I'm the one who created and has updated it. There are some SP-rated oils in there as well. It's making it more difficult because Mobil 1 probably noticed me being able to figure out their base-oil viscosity and VII content of their oils and has stopped publishing KV and VI data to protect the recipes of their oils.
My comment about ILSAC XW-30 oils being bound to HTHS ~ 3.0–3.2 cP because of fuel efficiency remains valid regardless of oil updates.
What KV data do you need? This is on M1 EP's PDS (5W-30 and 10W-30 are the last two respectively):
| Kinematic Viscosity @ 100 C, mm2/s, ASTM D445 | 8.6 | 9 | 10.6 | 10.2 |
| Kinematic Viscosity @ 40 C, mm2/s, ASTM D445 | 55 | 50 | 60 | 64 |
and then this is 5W-30's website giving the VI data for it:
Properties and Specifications
| Property | |
| Grade | SAE 5W-30 |
| Density @ 15.6 C, g/cm3, ASTM D4052 | 0.851 |
| Kinematic Viscosity @ 100 C, mm2/s, ASTM D445 | 10.6 |
| Pour Point, °C, ASTM D97 | -40 |
| Viscosity Index, ASTM D2270 | 169 |
| Mini-Rotary Viscometer, Apparent Viscosity, -35 C, mPa.s, ASTM D4684 | 11700 |
| Ash, Sulfated, mass%, ASTM D874 | 0.9 |
| Hi-Temp Hi-Shear Viscosity @ 150 C, mPa.s, ASTM D4683 | 3.0 |
| Flash Point, Cleveland Open Cup, °C, ASTM D92 | 230 |
| Total Base Number, mgKOH/g, ASTM D2896 | 9 |
Link?
Here's the EP 5W-30 info: https://www.mobil.com/en-cn/passenger-vehicle-lube/pds/ap-zh-mobil-1-extended-performance-5w30
and then the different grades but less detailed: https://www.mobil.com/en-us/passenger-vehicle-lube/pds/na-xx-mobil-1-extended-performance
Sometimes you just have to laugh.
Sometimes you need to ignore those people who laugh.
HPL corrected the errors in their spec sheets after my calculator discovered some errors in them. They were amazed how accurate my numbers for the VII content were.