OVERKILL
$100 Site Donor 2021
It's shown on the Mobil Product Guide:Is Zn/P 0.11% still in place? TDS for XW-40 was missing for quite some time and still is. I was expecting a change.
It shows 1,000ppm phosphorous, 1,100ppm zinc.
It's shown on the Mobil Product Guide:Is Zn/P 0.11% still in place? TDS for XW-40 was missing for quite some time and still is. I was expecting a change.
Do they ever have accurate KV values in MSDSs? They seem to be generic values for that product type.Yeah, that SDS still has a very old KV100 on it (13.8), and it's from earlier in the year. I'm holding out to see they update it again in the next month to match the current PDS.
Good point! Thought it was 13.8 at one point in time!Do they ever have accurate KV values in MSDSs? They seem to be generic values for that product type.
The HTHS table has the values for the PAO-based SM and Group-III+-Visom-based SN versions.Good point! Thought it was 13.8 at one point in time!
Yes, they do have some fantastic properties:The HTHS table has the values for the PAO-based SM and Group-III+-Visom-based SN versions.
The Group-III+-Visom-based version is still the best version of M1 0W-40 A3/B4 ever. That Visom Group III+ base stock was an exceptional base stock with a very high viscosity index (VI), better than Shell's GTL base stocks, with a higher VI than theirs.
ExxonMobil Visom Group III+ base stocks readily beat the ExxonMobil SpectraSyn PAO base stocks in viscosity index (VI), which have VI = 126, 138, and 139 for KV100 = 4.1, 5.8, and 8.0 cSt, respectively. A higher base-oil viscosity index (BO VI) means less viscosity-index improver (VII) and a thicker base oil.Yes, they do have some fantastic properties:
View attachment 124681
Yup, you have to step up to the SpectraSyn Plus 6 to get a better VI than the VISOM 6cSt which is 143 vs 142.ExxonMobil Visom Group III+ base stocks readily beat the ExxonMobil SpectraSyn PAO base stocks in viscosity index (VI), which have VI = 126, 138, and 139 for KV100 = 4.1, 5.8, and 8.0 cSt, respectively. A higher base-oil viscosity index (BO VI) means less viscosity-index improver (VII) and a thicker base oil.
If you are looking for a stout A3/B4 XW-40, Pennzoil Platinum 5W-40 A3/B4 SP is the way to go, not these thin 0W-40 oils packed with VII. PP 5W-40 A3/B4 SP is a lot thicker in both HTHS and HTFS than these thin 0W-40 oils. A 0W-40 could be as thin as a 0W-20 in the valvetrain and rings—and even in the bearings at high RPMs—so, be warned. There are actually 0W-20 oils that are thicker than these 0W-40 oils in those areas and situations. More VII means a thinner base oil because otherwise the oil will not the pass the low-temperature pumping viscosity (MRV) test.
Pennzoil Platinum 5W-40 and Quaker State 5W-40 use natural-gas-based (GTL) API Group III+ or III++, and that should be good. Castrol 0W-40 probably has some API Group IV (PAO) mixed with petroleum-based API Group III. Which one has a higher base-oil quality? It is hard to say, but it probably does not make much difference.But don’t the 0w-xx counterparts usually have better base oils? How would you compare say Castrol euro 0w40 up against PP euro 5w40?
Castrol Edge 0W40 SN version had probably close to 50% PAO. msds says 25-50%, but pour point was -60, so probably on higher end.Pennzoil Platinum 5W-40 and Quaker State 5W-40 use natural-gas-based (GTL) API Group III+ or III++, and that should be good. Castrol 0W-40 probably has some API Group IV (PAO) mixed with petroleum-based API Group III. Which one has a higher base-oil quality? It is hard to say, but it probably does not make much difference.
To answer the OP’s question directly there is no question in my mind that the Mobil 1 FS 0w40 is the choice. I don’t say that on speculation. I say that based on my experience looking at the FS 0w40 in our lab. If I was in a spot where I could not get my own oil I would grab that oil to put in any vehicle I own without question.
That 2 bucks a jug difference is a real game changer.Quality wise they are total equals in my mind. but the decision is easy Mobil 1 EP $26.47 Castrol $28.94.
Based on Ph/Zn alone, Mobil wins. Castrol is down 100ppm at 900/1000.It's shown on the Mobil Product Guide:
It shows 1,000ppm phosphorous, 1,100ppm zinc.
Clearly it is for some.That 2 bucks a jug difference is a real game changer.
How would you rate the SP version ?ExxonMobil Visom Group III+ base stocks readily beat the ExxonMobil SpectraSyn PAO base stocks in viscosity index (VI), which have VI = 126, 138, and 139 for KV100 = 4.1, 5.8, and 8.0 cSt, respectively. A higher base-oil viscosity index (BO VI) means less viscosity-index improver (VII) and a thicker base oil.
Why does nobody ever talk about Valvoline 540 Euro? Where was this fall in this group?